taxonID	type	description	language	source
AF4287B1FF87FFCBFF2BFB68FC377E3A.taxon	type_taxon	Type species: Oribatella quadridentata Banks, 1895, p. 8.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF87FFCBFF2BFB68FC377E3A.taxon	diagnosis	Diagnosis. Adult. Species comprising this genus are unique among Oribatellidae (Grandjean 1953 b, Bernini 1978) in having the following combination of character states. Notogaster with immovable pteromorphs. Octotaxic system as 4 pairs of porose areas or saccules; usually without sexual dimorphism, when present that of male modified. Notogaster with 10 to 14 pairs of short to very long setae. Lamellae long, broad, with large cusps, medially converging or contiguous; cusps usually with large medial and lateral dens; translamella (Fig. 4 B arrow) variable in width and depth, with or without medial tooth. Bothridial wall distally expanded. Genal tooth with longitudinal ridge ventrally, either broad, subtriangular to subrectangular in shape, with dens ventrodistally (Fig. 1 B arrow), or broad, subrectangular, rounded distally, without dens ventrodistally (Fig. 2 E arrow). Tutorium broad, lamelliform, cusp rectangular or subrectangular, with dens distally, lying parallel to dorsal contour of prodorsum in lateral aspect, extending well anterior to insertion of rostral seta. Custodium usually present, with short to long, free distal point. Axillary saccule present at base of palp. Chelicera chelate-dentate, elongated in one species. Mentum with or without tectum, with or without recurved ridge distally (Fig. 2 D). Palp setal formula 0 – 2 – 1 – 3 – 9 (1) or 0 – 2 – 1 – 3 – 8 (1); eupathidium acm subequal in length to solenidion, forming double horn with solenidion along length or distally; in one species solenidion almost 2.5 x length of acm (Fig. 20 E). Humerosejugal porose organ Ah expressed as porose area (Fig. 9 C) or saccule; porose area Al present or absent, when present expressed as porose area or saccule. Legs monodactylous, heterobidactylous or heterotridactylous. Femur III with seta l’ present or absent; seta v' of genua I and II present or absent. Setae l ” of genua and tibiae I and II thicker, more heavily barbed and longer than setae l’ on these segments. Setae l' on genu and tibia IV thicker, more heavily barbed and longer than other setae on these segments. One or two anterodorsal spines may be present on tibia I close to, or between, solenidia φ 1 and φ 2 (Fig. 2 F arrow). Immatures. Apopheredermous, with scalps of preceding instar maintained away from dorsal integument by modified setae da and dorsally directed h 1. Body colorless, cuticle without plicae. All or most gastronotic setae long; setation usually unideficient; larva with 11 or 12 pairs, protonymph with 15 pairs (adult loses at least c 1), deutonymph and tritonymph with 13 to 15 pairs. Setae dm and dp subequal in length to da in all immatures, or much shorter than da in deutonymph and tritonymph, or dm and dp absent from deutonymph and tritonymph. Hysterosomal sclerites absent. Pair of humeral organs present laterally in sejugal region. Without apodemato-acetabular tracheal system or porose homologues. Paraprocts atrichous in larva, protonymph and deutonymph. Genital setal formula (larva to adult): 0 – 1 – 3 – 5 – 6. Aggenital setal formula 0 – 0 – 1 – 1 – 1, or aggenital seta absent. Opisthonotal gland present in all instars. Cupule development normal. Bothridium and bothridial seta fully formed in all instars. Setation of protonymphal leg IV normal (0 – 0 – 0 – 0 – 7). Larva to deutonymph with circular line of dehiscence, such that dorsal scalp separates from ventral piece at ecdysis.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF81FFCCFF2BFF55FF7B7BD2.taxon	materials_examined	Material examined. Svalbard, Adventsdalen, Nordlysstasjonen, sample 3 / 1, 30. vi. 2009 (T. Solhøy) 22 specimens; U. S. A.: Alaska, College (?), 1 mi. N (?) 4 vi. 1948 (S. Lienk) female; (note, this specimen was identified by M. Hammer and formed part of her study on Alaskan Oribatida (Hammer 1955 )); the specimen was remounted by R. A. Norton 25. xi. 1983 (RNC); Canada: Northwest Territories, Bernard Harbour, 10. vii. 1988 (J. Troubridge) from litter under willows; from Silene acaulis (L.) on acid slope; from Astragalus alpinus L.; 11. vii. 1988, from mouse nest; Banks Island, Nanuk, 73 ° 05 ’ N 123 ° 23 ’ W, 20. viii. 1974 (T. Beck, V. Day) from sparse tundra vegetation; Yukon Territory: nr. Spring River, 69 ° 10 ’ N 138 ° 30 ’ W, 18. i. 1971 (P. Kevan) frozen (- 50 F) when collected; Blow River, 68 ° 56 ’ N 137 ° 06 ’ W, 7. vii. 1987 (VBP) from litter of tall grass on river bank; from willow litter and moss in small gorge; from very rich Alnus, Ribes, Salix litter on bluffs above river; from Alnus, Spiraea, Ribes, Vaccinium, Artemesia litter; Running River, 68 ° 57.5 ’ N 137 ° 17 ’ W, 7. vii. 1987 (VBP) from litter of Pyrola, Saxifraga spp., Castilleja, Epilobium, moss and lichens; Nunavut: Somerset Island, 7. viii. 1974 (K. Hay) from arctic willow and moss.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF81FFCCFF2BFF55FF7B7BD2.taxon	diagnosis	Diagnosis. Total length of adult 420 – 490 µm, notogastral width 300 – 320 µm (data from Thor 1930). Integument of prodorsum, notogaster, venter and mentum micropunctate (Fig. 1 D, F). Integument of coxisternum with very faint striae; integument of lamellae with long striae (Fig. 1 A); integument of pedotectum I with faint reticulate pattern. Rostrum tridentate: with deep, wide, parallel-sided indentation, forming 2 lateral teeth, margin between teeth with single, medial tooth, subequal in length to lateral teeth (Fig. 1 B). Lamella with cusp about 89 µm long, cusp about 55 µm long and 38 µm wide at level of insertion of seta le. Lamellar cusps contiguous, or not, anteromedially; separated posteromedially, leaving prodorsum visible through oval opening about 6 µm at greatest width. Translamella without tooth, about 7 µm at greatest width and depth. Medial dens on lamellar cusp about 12 – 36 µm long, one-third to subequal lateral dens (31 – 48 µm) (Fig. 1 A, 1 C). Medial dens with 0 – 1 teeth, lateral dens with 2 – 4 teeth. Number of teeth on lateral margin of cusp varying among specimens and on either side of same specimen. Seta ro about 64 µm long, strongly barbed along length, acuminate, strongly directed medially. Setae le about 53 µm long, thick, heavily barbed, tapered. Setae in about 91 µm long, thick (less so than le), heavily barbed, tapered; mutual distance of pair about 38 µm. Bothridial setae about 84 µm long, with barbed, fusiform to clavate head, rounded distally (Fig. 1 A, 1 C), stalk short, smooth; head directed slightly anteromedially. Exobothridial setae about 19 µm long, thin, tapered. Genal tooth broad, subrectangular, with dens ventrodistally (Fig. 1 B arrow), without dens anterodorsally; with longitudinal ridge ventrally. Tutorium about 96 µm long, of which cusp about 43 µm long, rectangular, distal margin with 6 dens. Custodium about 24 µm long, apex directed anteroventrally (Fig. 1 E). Porose area Al about 10 µm in diameter. Notogaster length subequal to width. Anterior margin undulating, with small projection lateral to bothridium, with 3 – 5 transverse ridges. Pteromorph rounded anteroventrally. Porose areas small, Aa about 8 µm wide. Ten pairs of smooth notogastral setae present; c setae 27 – 30 µm, l and h series setae about 19 µm, p series setae about 16 µm. Notogastral setae positioned laterally, lm posterior to Aa; lp anterior of A 1. Distance setae h 1 – h 1 about 26 µm, wider than distance p 1 – p 1 about 19 µm. Lenticulus very faint. Epimeral setae 3 c and 4 c subequal in length and shape to other epimeral setae. Genital, aggenital, anal and adanal setae smooth, about 10 – 14 µm long; genital setae 2 + 4, g 1 an d g 2 on anterior margin of plate. Postanal porose area oval 16 x 10 µm. Mentum without thickened ridge anteromedially, without tectum (Fig. 1 F). Axillary saccule about 4 x 2 µm. Leg setation (I to IV): trochanters, 1 - 1 - 2 - 1; femora, 5 - 5 - 3 - 2; genua, 3 (1) - 3 (1) - 1 (1) - 2; tibiae 4 (2) - 4 (1) - 3 (1) - 3 (1); tarsi, 20 (2) - 15 (2) - 15 - 12. Seta l “ of genu I about 29 µm. Tarsi heterotridactylous.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF81FFCCFF2BFF55FF7B7BD2.taxon	discussion	Remarks. The type specimens of O. arctica, collected from Svalbard, Norway (Thor 1930) are destroyed (Marshall et al. 1987), but I have examined specimens collected from this island by Torstein Solhøy. Thor (1930) described the dens of the lamellar cusps as being of almost equal length. In the specimens that I have examined from Svalbard and elsewhere the relative length of medial and lateral dens is highly variable. In specimens from the same sample the medial dens can vary from one- third to subequal to the length of the lateral dens. For example, on one specimen from Yukon, medial dens 22 µm, lateral dens 31 µm on one cusp, medial dens 13 µm and lateral dens 36 µm on second cusp; on second specimen from same sample: medial dens 23 µm, lateral dens 48 µm on one cusp and medial dens 17 µm, lateral dens 44 µm on second cusp; on a third specimen medial and lateral dens were equal in length on both cusps.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF81FFCCFF2BFF55FF7B7BD2.taxon	distribution	Distribution and Ecology. Oribatella arctica is known from arctic latitudes of the Nearctic and Palaearctic (Marshall et al. 1987). A subspecies, O. arctica littoralis Strenzke 1950, has been found associated with littoral habitats in the Netherlands (Polderman 1974), and has been used to evaluate archaeological findings (Schelvis 1990).	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF83FFC1FF2BFF55FB6E7EC8.taxon	materials_examined	Type material examined. Specimens (3 females, 1 male) on 4 slides labelled paratype: USA, New York: Ithaca, Buttermilk Creek, 21. v., 26 B 81 d, Remtd v. 1947, A. P. Jacot Coll. (MCZ). Specimens on 3 slides labelled Cotypes: New York: Danby to West Danby, 19. v. 1917 (A. P. Jacot), slides labelled 171 Oo 1 a (dissected female), 171 Oo 1 b (1 female), 171 Oo 1 c (1 male, 1 female) (MCZ). Other material examined. USA, Missouri: Roaring Rocks State Park, Trail to lookout tower, 13. v. 1999 (VBP) 1 from soil under rotting oak; Arkansas: Montgomery Co., Crystal / Collier area, 3. iv. 1992 (HWR); Newton Co., Richland Creek Wilderness, 35 ° 46 ’ 308 N 092 ° 56 ’ 016 ” W, 21. ix. 2001 (HWR) 2; Scott Co., Dry Creek Wilderness Area, NE boundary at 2100 ’, 6. iii. 1999 (HWR) 2 from old growth; Georgia: Okefenokee, (RNC) 1; Glynn Co., Jekyll Island, 31 ° 07.22 ’ N 081 ° 24.58 W, 28. ii. 2005 (VBP) 3 from Serenoa litter on seashore; Camden Co., Crooked River State Park, coastal shell midden forest, 30 ° 50.79 ’ N 081 ° 32.80 W, 26. ii. 2005 (VBP) 2 from Quercus myrthifolia Willd. litter; same data, except 2 from litter of old Quercus laurifolia Michx.; Mississippi, Oktibbeha Co., HWY 25, 11 mi S from Starkville, 21. ix. 1988 (G. T. Baker) 1; Texas, Aransas Co., Aransas National Wildlife Refuge, 28 ° 16 ’ 24 ” N 096 ° 47 ’ 56 ” W, 3. iii. 1995 (VBP) 1 from moist yaupon, live oak, persimmon litter on sand by bay; Bandera Co., Lost Maples State Natural Area, East Trail, 29 ° 48.984 ’ N 099 ° 34.999 W, 27. ii. 2007 (VBP) 1 from bigtooth maple and oak litter; Canada: Québec: Mont Orford Park, 2. viii. 1985 (VBP) 1 from beech litter, some Lycopodium; Mont Joli, 25. x. 1954 (J. E. H. Martin) 1; Cedarville, 45 ° 01 ’ 30.35 ” N 72 ° 13 ’ 58.97 ” W, Descente 20, 23. viii. 1985 (VBP) 2 from litter under Hericium on fallen dead beech; Nova Scotia, Cape Breton Highlands National Park, Mackenzie Mountain, 25. viii. 1983 (M. Sharkey) 1 from litter and moss.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF83FFC1FF2BFF55FB6E7EC8.taxon	diagnosis	Diagnosis. Total length of adult 470 – 572 µm. Notogastral width 300 – 382 µm. Integument of prodorsum, notogaster, venter and mentum micropunctate. Integument of coxisternum with distinct striae (Fig. 2 D). Rostrum flattened, undulating, with (Fig. 2 F, arrow) or without minute lateral teeth. Lamella (with cusp) 177 – 188 µm long, cusp 121 – 133 µm long, 61 – 65 µm wide at level of insertion of seta le. Lamellar cusps diverging or parallel anteromedially; separated posteromedially, leaving prodorsum visible through oval opening 35 – 54 µm long x 17 – 23 µm wide. Medial dens of lamellar cusps 38 – 50 µm, subequal or slightly shorter than lateral dens (48 – 65 µm long); medial dens smooth; lateral dens with 0 – 4 small teeth on lateral edge (varying among specimens and on either side of same specimen). Long striae extending longitudinally along outer margin of lamella. Translamella without tooth, about 17 – 19 µm at greatest width, about 13 – 16 µm deep (Fig. 2 C). Setae ro 108 – 128 µm long, strongly barbed along length, acuminate, strongly directly medially. Setae le about 105 – 115 µm long, thick, heavily barbed, tapered. Setae in 197 – 228 µm long, thick (less so than le), heavily barbed, tapered; mutual distance of pair about 57 – 74 µm. Bothridial setae 133 – 149 µm long, subequal in shape to seta le; with barbed, bacilliform head, rounded distally, stalk short, smooth; head directed slightly anteromedially (Fig. 2 A). Exobothridial setae about 43 – 65 µm long, thin, smooth, acuminate. Genal tooth broad, subrectangular, rounded distally, without dens ventrodistally, with longitudinal ridge ventrally (Fig. 2 D black arrow, 2 E arrow). Tutorium 168 – 201 µm long, of which cusp about 106 – 127 µm long, rectangular, convex ventrally, distal margin with 5 to 7 dens (Fig. 2 E). Custodium about 48 – 62 µm long, with 2 adjacent knobs along length (Fig. 3 C) (1 cotype specimen with knob distally). Porose area Al about 10 µm in diameter. Anterior margin of notogaster undulating, convex lateral of bothridium, with about 10 transverse ridges (Fig. 2 A – C). Pteromorph with short ridges at anterior margin; with dens anteroventrally. Porose areas present, Aa about 22 µm in diameter. Ten pairs of long, barbed notogastral setae present; c series 99 – 127 µm, l and h series 90 – 100 µm, p series about 77 µm long; c, l and h directed laterally, positioned so that lm medial of Aa, and lp anteromedial of A 1. Distance h 1 – h 1 about 58 – 67 µm, almost twice distance p 1 – p 1 (38 – 41 µm). Lenticulus subtriangular. Epimeral setae about 22 – 65 µm long, barbed, 3 b, 3 c about 48 µm long, 4 c about 65 µm long and more barbed than other epimeral setae, reaching tip of custodium (Fig. 3 C). Genital setae in longitudinal row, 1 + 5, one seta on anterior of genital plate; genital and aggenital setae about 29 µm long; anal and adanal setae barbed, about 23 – 38 µm long. Postanal porose area oval, about 50 µm wide. Mentum with small reticulate pattern, with anterior tectum covering base of gena, with transverse carina anteriorly (Fig. 2 D). Axillary saccule about 8 x 3 µm. Leg setation (I to IV): trochanters, 1 - 1 - 2 - 1; femora, 5 - 5 - 3 - 2; genua, 3 (1) - 3 (1) - 1 (1) - 2; tibiae 4 (2) - 4 (1) - 3 (1) - 3 (1); tarsi, 20 (2) - 15 (2) - 15 - 12. Seta l " on genua and tibiae I and II about 43 – 55 µm. Tarsi heterotridactylous.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF83FFC1FF2BFF55FB6E7EC8.taxon	discussion	Remarks. Jacot (1934 a, p. 710) described the subspecies O. brevicornuta extensa, from Florida, Illinois, Indiana, Iowa, Ohio and Virginia. He distinguished the subspecies on the basis of lamellar cusps being longer and more slender than those of O. brevicornuta sensu stricto. Subsequently this subspecies was elevated to species status (Johnston 1965), without any rationale given. I examined one type specimen of O. brevicornuta extensa, specifically: cotype female (with 5 eggs) labelled Cotype: “ 26 Ew 147, Arcola Ill, July 4, 06. B 147. K. & P. in 80 % alc. M. July 7, ’ 06. H. e. Ewing ” (MCZ). All character states fall within the range of variation in O. brevicornuta sensu stricto noted in the diagnosis given above. More specifically the length and width of lamellar cusps and the length and width at midlength of cusp dens fall within the range of variation for the type material of brevicornuta sensu stricto. Thus, the elevation of the subspecies to species by Johnston (1965) should be rejected, but I consider it premature to reject subspecific status, i. e., retention of O. brevicornuta extensa, until the species is studied with molecular methods. Jacot usually denoted his type material as “ cotypes ”. The word “ paratype ” on labels for the 4 specimens from USA, New York: Ithaca, Buttermilk Creek, 21. v.,. 26 B 81 d, Remtd v. 1947, A. P. Jacot Coll., noted in the Material Examined Section is not in Jacot’s handwriting.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF83FFC1FF2BFF55FB6E7EC8.taxon	distribution	Distribution and Ecology. Oribatella brevicornuta is widely distributed in deciduous forests throughout eastern North America, from Nova Scotia, Canada to Texas, USA (Table 1). In addition to the Material examined above, it has been recorded from Connecticut and North Carolina (refs. in Marshall et al. 1987).	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF8FFFC2FF2BFF55FCB07BD6.taxon	description	(Fig. 4 A, B)	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF8FFFC2FF2BFF55FCB07BD6.taxon	materials_examined	Type material examined. Cotype female, Illinois: Urbana, 21. iii. 1908 (H. E. Ewing) from under dead bark (label reads: “ Urbana, Ill. Mar. 21 by myself. Under dead bark. Or. C. ho. 18. Cl. Oil berg. M. in bal. Mar. 24, ’ 08. H. E. Ewing ”) (USNM). Other material examined. USA, New York: Onondaga Co., 1988 (J. R. Philips) from nest of red-tailed hawk (RNC); Cortland Co., Truxton, Taylor Valley State Forest, iii. 1974 (W. Jones) from elm log (RNC); Missouri: Boone Co., Hinkson Cr., Columbia, S. U. Mo. Campus, 25. iv. 1985 (J. Kethley, R. A. Norton) FMHD # 85 – 130, from mixed mesophytic forest litter, flood plain (RNC); Canada, Ontario: 2 mi E Dunrobin, 23. iii. 1978 (EEL) 1 from under bark of elm; S. shore Black Sturgeon Lake, 49 ° 17.5 N 88 ° 48 ’ W, 23. viii. 1972 (EEL) 1 from small polypore bracket on fir log; same data except, 2 from burrow debris under rotten cedar stump; same data except, 1 from under rotten log; Québec, Gatineau Park, 1. ix. 1967 (D. P. Pielou); 30. vii. 1968 (D. P. Pielou) from Polyporus betulinus (Bull.) Fr.; same data except 27. ix. 1967 (W. G. Matthewman) from Fomes fomentarius (L.: Fr.) Kickx.; New Brunswick, Kouchibouguac National Park, 27 – 29. ix. 1977 (IMS) 1 from ant workings and soil under fir log; same data except, 1 from decaying wood and litter in fir stump.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF8FFFC2FF2BFF55FCB07BD6.taxon	diagnosis	Diagnosis. Total length of adult 366 – 372 µm. Notogastral width 246 – 253 µm. Integument of prodorsum, notogaster, venter and mentum microtuberculate. Rostrum with deep, wide parallel-sided indentation, forming 2 lateral teeth; margin between teeth with single medial tooth, two-thirds to equal length of lateral teeth. Lamella (including cusp) 106 – 110 µm long, cusp about 72 µm long, 38 – 43 µm wide at level of insertion of seta le. Lamellar cusps contiguous anteromedially; separated posteromedially, leaving prodorsum visible through oval opening, about 10 µm wide, 18 µm long. Medial dens on lamellar cusp 24 – 32 µm long, without teeth, lateral dens 43 – 51 µm long, with 1 – 4 teeth on lateral margin (varying among specimens and on either side of same specimen); medial dens narrower than lateral dens (Fig. 4 A, B). Short, longitudinal striae on lamella laterally and medially. Translamella without tooth, about 11 µm at greatest width, 10 µm deep (Fig. 4 B). Setae ro about 75 µm long, strongly barbed along length, acuminate, strongly directed medially. Setae le about 79 µm long, thick, heavily barbed, tapered. Setae in about 130 µm long, thick (less so than le), heavily barbed, tapered; mutual distance of insertions 41 – 47 µm. Bothridial setae 70 – 80 µm long, with barbed, clavate head, rounded distally, stalk short, smooth; head directed anteromedially. Exobothridial setae about 19 µm long, thin, barbed tapered. Genal tooth broad, subrectangular, with dens ventrodistally, with longitudinal ridge ventrally. Tutorium about 104 µm long, of which cusp about 53 µm long, rectangular, distal margin with 2 to 3 dens. Custodium about 22 – 30 µm long, apex directed anteroventrally. Porose areas Al about 10 µm in diameter. Notogastral length subequal to width. Anterior margin undulating, convex lateral of bothridium, with 5 – 7 transverse ridges. Pteromorph with short ridges at anterior margin; without small dens on anteroventral margin. Porose areas about 8 µm in diameter. Ten pairs of long, smooth, acuminate notogastral setae present; c, and l and h series 48 – 58 µm long, with c longest, p series about 35 µm; setae positioned laterally, other than lm; lm posteromedial of Aa, lp anterior of A 1. Distance p 1 – p 1 about 20 µm, subequal to distance h 1 – h 1. Subtriangular lenticulus present. Epimeral setae mainly 22 µm long, weakly barbed, 3 b, 3 c and 4 c 38 µm long, subequal in shape and width to other epimeral setae. Genital, aggenital, anal and adanal setae weakly barbed, about 9 – 14 µm long. Genital setae either 2 + 4 or 3 + 3; 2 or 3 pairs of genital setae on anterior margin of plates. Postanal porose area oval 16 x 8 µm. Mentum without transverse carina anteriorly, without tectum. Axillary saccule about 6 x 2 µm. Leg s etation (I to IV): trochanters, 1 - 1 - 2 - 1; femora, 5 - 5 - 3 - 2; genua, 3 (1) - 3 (1) - 1 (1) - 2; tibiae 4 (2) - 4 (1) - 3 (1) - 3 (1); tarsi, 20 (2) - 15 (2) - 15 - 12. Setae l ” on genu I about 29 µm, l ” on genu II about 43 µm. Tarsi heterobidactylous (Fig. 4 A insert).	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF8FFFC2FF2BFF55FCB07BD6.taxon	discussion	Remarks. In all specimens of Oribatella dentaticuspis I examined, including a cotype female collected by Ewing, the legs are heterobidactylous. Ewing himself (1910) incorrectly described the legs as tridactylous, and this was repeated in the redescription of Woolley (1958) as a direct quote. Woolley relied heavily on illustrations of type specimens drawn by E. W. Baker (one of which was redrawn by Grabowski 1967), and apparently did not study the legs directly. Woolley noted that the total length of 0.55 mm reported by Ewing (1910) was inflated; the illustrated cotype was instead 366 µm. The latter figure is consistent with the range indicated above.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF8FFFC2FF2BFF55FCB07BD6.taxon	distribution	Distribution and Ecology. This species is distributed throughout northcentral and northeastern North America, associated with forest litter and polypore fungi (Table 1).	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF89FFC4FF2BFF55FC2D7BC4.taxon	description	(Figs. 5, 6 A – C)	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF89FFC4FF2BFF55FC2D7BC4.taxon	materials_examined	Material examined. Holotype: male USA: Virginia, Grayson Co., Hwy 603 at Fox Creek, 6 km W Troutdale, 5. viii. 1986 (EEL) from Trametes versicolor (L.) polypore fungi and lichen on hardwood, deposited in the CNC, type number 23954. Paratypes: 1 female with same data as holotype; Virginia, Nelson Co., Washington National Forest, Blue Ridge Parkway, Wintergreen Trail, 1. x. 1992 (VBP) 1 male from litter under dead shagbark hickory in oak / hemlock forest; Canada, Québec, Gatineau Park, 22. x. 1965 (W. G. Matthewman) 1 from Fomes fomentarius; 9. v. – 31. x. 1968 (D. P. Pielou) 24 from Polyporus betulinus. Paratypes deposited in the CNC.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF89FFC4FF2BFF55FC2D7BC4.taxon	diagnosis	Diagnosis. Total length of adult 410 – 440 µm. Integument of prodorsum, notogaster, anal plates, genital plates, venter and mentum microtuberculate. Rostrum with medial indentation and 2 strong lateral teeth; without strong medial crest. Lamella (including cusp) about 133 µm long; cusp about 90 µm long, about 38 µm wide at level of insertion of seta le. Translamella without tooth, interlamellar region distinctly V-shaped posteriorly. Ten pairs of smooth, flagellate notogastral setae present; about 50 µm long (tips of some setae broken on specimens), lm posterior of Aa, and lp anteromedial of A 1; mutual distance p 1 – p 1 about 20 µm, narrower than distance h 1 – h 1 (about 35 µm). Tarsi heterotridactylous.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF89FFC4FF2BFF55FC2D7BC4.taxon	description	Description. Adult. Dimensions: Total length: paratype female 440 µm; holotype male 410 µm. Notogastral width: paratype female 310 µm; holotype male 275 µm. Integument: Prodorsum, notogaster, anal plates, genital plates, venter and mentum microtuberculate, microtubercles and striae on coxisternum. Tutorium with small reticulate pattern dorsally. Lamellae with widely spaced, faint longitudinal striae. Prodorsum: Rostrum with medial indentation and 2 strong lateral teeth; without strong medial crest (Fig. 6 A). Lamella (including cusp) about 133 µm long, cusp about 90 µm long, about 38 µm wide at level of insertion of seta le. Lamellar cusps contiguous anteromedially; separated posteromedially, leaving prodorsum visible through oval opening, about 13 µm wide x 33 µm long. Translamella without tooth, about 13 µm at greatest width, interlamellar region distinctly V-shaped posteriorly (Fig. 5). Medial dens on lamellar cusp about 40 µm long, without teeth; lateral dens about 50 µm long with 0 – 1 tooth on lateral margin (Fig. 5). Setae ro about 88 µm long, strongly barbed along length, acuminate, curved anteromedially. Setae le about 85 µm long, thick, heavily barbed, tapered. Setae in about 130 µm long, thick (less so than le), barbed, tapered, parallel; mutual distance of pair about 40 µm. Bothridial setae about 75 µm long, with barbed, club-shaped head, tapered distally, stalk short, smooth; head directed slightly anteromedially (Fig. 5). Exobothridial setae about 16 µm long, thin, smooth. Lateral aspect of podosoma: Genal tooth broad, subrectangular, with dens ventrodistally, with longitudinal ridge ventrally (Fig. 6 A). Tutorium broad, rectangular about 133 µm long, of which cusp about 68 µm long, rectangular, distal margin with 5 – 6 dens (Fig. 6 B). Custodium about 31 µm long, extending to middle of pedotectum II (Fig. 6 C). Porose area Al about 7 µm in diameter. Notogaster: Length subequal to width. Anterior margin undulating, convex lateral of bothridium, with 2 – 3 transverse ridges. Pteromorph without striae; with or without small dens on anteroventral margin. Octotaxic system in form of porose areas, 10 – 12 µm in diameter. Ten pairs of smooth, flagellate notogastral setae present; about 50 µm long (tips of some setae broken on specimens), with c seta longest; lm posterior of Aa, and lp anteromedial of A 1; distance p 1 – p 1 about 20 µm, narrower than distance h 1 – h 1 (about 35 µm) (Fig. 5). Diffuse subtriangular lenticulus present (not illustrated). Ventral region: Epimeral setae mostly about 11 – 21 µm long, weakly barbed acuminate, 3 c about 32 µm long, distinctly barbed, 4 c about 32 µm long, thick and heavily barbed, much thicker than other epimeral setae (Fig. 6 C). Genital, anal and adanal setae weakly barbed, about 13 µm long; genital setae 3 + 3, 3 setae on anterior margin of plate. Aggenital setae about 5 µm. Lyrifissure iad anterolateral of and almost parallel to anal plate. Postanal porose area about 30 x 5 µm. Gnathosoma: Mentum without transverse carina anteriorly, without tectum. Axillary saccule about 4 x 2 µm. Legs: Setation (I to IV): trochanters, 1 - 1 - 2 - 1; femora, 5 - 5 - 3 - 2; genua, 3 (1) - 3 (1) - 1 (1) - 2; tibiae 4 (2) - 4 (1) - 3 (1) - 3 (1); tarsi, 20 (2) - 15 (2) - 15 - 12. Setae l ” on genu I about 38 µm; l ” on genu II about 43 µm. Tarsi heterotridactylous.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF89FFC4FF2BFF55FC2D7BC4.taxon	etymology	Etymology. The specific epithet refers to the flagellate form of the notogastral setae.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF89FFC4FF2BFF55FC2D7BC4.taxon	distribution	Distribution and Ecology. This species is known only from different species of polypore fungi. The 1965 record from Gatineau Park, Québec was included in the study of the fauna of Fomes fomentarius (Pielou & Matthewman 1966), incorrectly identified as Oribatella quadricornuta.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF8BFFC7FF2BF90EFE247970.taxon	materials_examined	Topotypic material examined. Topotypes: 2 males, 1 female, compared with type by R. A. Norton 19. viii. 1988, from USA, Missouri, Boone Co., Hinkson Creek, Columbia, S. U. Mo. Campus, 25. iv. 1985 FMHD # 85 – 130 (J. Kethley, R. A. Norton) from mixed mesophytic flood plain (RNC). Other material examined. Missouri, Boone Co., Ashland Wildlife Management Res., 26. iv. 1985, FMHD # 85 – 137 (J. Kethley, R. A. Norton) 1 from mixed mesophytic litter with maidenhair fern (RNC).	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF8BFFC7FF2BF90EFE247970.taxon	diagnosis	Diagnosis. Total length of adult 606 – 653 µm, length topotype males 614, 624 µm, topotype female 653 µm. Integument of prodorsum, notogaster, venter and mentum micropunctate. Rostrum pointed in dorsal aspect, with medial crest; rostral margin round, smooth to undulating. Lamella (including cusp) about 225 µm long, cusp 160 µm long, about 75 µm wide at level of insertion of seta le. Lamellar cusps contiguous anteromedially; separated posteromedially, leaving prodorsum visible through oval opening, about 36 µm at greatest width, 56 µm long (Fig. 4 C, D). Medial and lateral dens on lamellar cusp subequal, about 63 µm long. Medial dens with 0 – 2 teeth, lateral dens with 2 teeth. Longitudinal striae on lamella laterally (Fig. 4 D). Translamella without tooth, about 38 µm at greatest width, 25 µm deep (Fig. 4 D). Setae ro about 138 µm long, strongly barbed along length, acuminate, strongly directly medially. Setae le about 113 µm long, thick, heavily barbed, tapered. Setae in about 252 µm long, thick (less so than le), heavily barbed, tapered; mutual distance of pair about 100 µm. Bothridial setae 137 µm long, with barbed, narrowly fusiform head, tapered distally, subequal in width to lamellar setae (Fig. 4 C); stalk short, smooth; head directed anteromedially. Genal tooth broad, subrectangular, rounded distally, without dens ventrodistally, with longitudinal ridge ventrally. Tutorium about 238 µm long, extending anterior of rostrum, of which cusp about 138 µm long, rectangular, convex ventrally, distal margin with 5 to 7 dens. Custodium about 50 – 63 µm long, tapered. Porose area Al about 10 µm in diameter. Notogaster length subequal to width. Anterior margin undulating, convex lateral of bothridium, with 12 – 14 transverse ridges. Pteromorph with short ridges at anterior margin; with small dens on anteroventral margin. Porose areas present, about 18 µm in diameter. Ten pairs of long, barbed, acuminate notogastral setae present, about 113 µm long, lm medial to posteromedial of Aa, lp medial and slightly anterior to A 1. Distance h 1 – h 1 about 48 µm, distance p 1 – p 1 about 29 µm. Subtriangular lenticulus present. Coxisternum with distinct longitudinal striae (Fig. 4 E). Epimeral setae mostly about 24 µm long, weakly barbed, 3 c about 55 µm long, subequal in shape and width to other epimeral setae, 4 c about 65 µm long subequal in shape and width to other epimeral setae. Genital, aggenital, anal and adanal setae weakly barbed, about 9 – 14 µm long. Genital setae 1 + 5, 1 pair of genital setae on anterior margin of plates. Postanal porose area oval 25 x 12 µm. Mentum with transverse carina anteriorly, with small tectum. Axillary saccule about 4 x 2 µm. Legs setation (I to IV): trochanters, 1 - 1 - 2 - 1; femora, 5 - 5 - 3 - 2; genua, 3 (1) - 3 (1) - 1 (1) - 2; tibiae 4 (2) - 4 (1) - 3 (1) - 3 (1); tarsi, 20 (2) - 15 (2) - 15 - 12. Setae l ” on genu I about 50 µm, l ” on genu II about 70 µm. Tarsi heterotridactylous.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF8BFFC7FF2BF90EFE247970.taxon	discussion	Remarks. This is one of the species described by Berlese (1916) from “ Columbia (N. A.) ” which caused consistent problems in the literature until the provenance was clarified as Columbia, Missouri by Norton and Kethley (1989, p. 422). These authors subsequently collected topotypes from this locality, which were examined (see above).	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF8BFFC7FF2BF90EFE247970.taxon	distribution	Distribution and Ecology. This very large species is known only from its type locality and from 1 other location in Missouri.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF8AFFDBFF2BFA68FED47D62.taxon	description	(Figs. 7, 8)	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF8AFFDBFF2BFA68FED47D62.taxon	materials_examined	Material examined. Holotype: female, USA, Missouri, Boone Co., Hinkson Creek S Univ. Mo. Campus, 25. iv. 1985 FMHD # 85 – 128 (J. Kethley, R. A. Norton) from red and chestnut oak, sugar maple litter on ridge top (FM). Paratypes (all in FM if not indicated otherwise): Missouri, Boone Co., Hinkson Creek S Univ. Mo. Campus, 24. iv. 1985 FMHD # 85 – 115 (J. Kethley, R. A. Norton) 1 female from moss on base of tree; 25. iv. 1985 FMHD # 85 – 122 (J. Kethley, R. A. Norton) 1 female from red chestnut oak litter in limestone pit; 25. iv. 1985 FMHD # 85 – 126 (J. Kethley, R. A. Norton) 1 female from wood of rotten log at base of slope; 25. iv. 1985 FMHD # 85 – 127 (J. Kethley, R. A. Norton) 1 female from mixed deciduous litter on dry ridge top; 25. iv. 1985 FMHD # 85 – 130 (J. Kethley, R. A. Norton) 2 males from floodplain litter in mixed mesophytic forest; 29. iv. 1985 FMHD # 85 – 160 (J. Kethley, R. A. Norton) 1 male from red and chestnut oak, sugar maple litter at log; 30. iv. 1985 FMHD # 85 – 166 (J. Kethley, R. A. Norton) 1 male from red cedar litter on ridge top; Lake of the Ozarks State Park, Woodland Trail, elv. 900 ’, 38 ° 05 ’ N 92 ° 37 ’ W, 14. v. 1999 (VBP) 1 female from soil in dried up stream (CNC). Other material examined: Wisconsin: Nicolet National Forest, Scott Lake Nature Trail, 45 ° 46 ’ N 89 ° W; 25. x. 1998 (VBP and M. Behan) 2 from hemlock litter in 200 + year old stand, some birch; Illinois, Pope Co., Shawnee National Forest, Bell Smith Springs, 37 ° 30 ’ 10 ” N 88 ° 3 ’ 30 ” W, 23. ix. 1992 (VBP) 2 from lichens, moss, cedar litter on sandstone ridge above canyon; Arkansas, Scott Co., Dry Creek Wilderness Area, NE boundary at 2100 ’, 6. iii. 1999 (HWR) 4 from old growth; Polk Co., Bard Springs, 6. vi. 1992 (HWR) 2; Newton Co., Richland Creek Wilderness, 35 ° 46 ’ 308 ” N 92 ° 56 ’ 016 ” W, viii, 2002 (HWR) 1; Canada, Ontario, Leeds-Grenville Co., nr. Otter Lake, 44 ° 34.85 ’ N 76 ° 20 ’ W, 23. vii. 2003 (J. Chen, VBP, J. Johnson) 1 from rotting paper birch litter; Nova Scotia, Cape Breton Highlands National Park, Mica Mt. Trail, 7. ix. 1983 (VBP) 1 from lichen, Ledum, shrub Abies and Vaccinium litter in hollow; North Mountain Bog, 26. viii. 1983 (M. Sharkey) 2.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF8AFFDBFF2BFA68FED47D62.taxon	diagnosis	Diagnosis. Total length of adult 576 – 634 µm. Integument of prodorsum, notogaster, genital and ventral plate micropunctate, mentum microtuberculate; short striae present on lenticulus and long striae on lateral of lamellae and in coxisternal region. Lamella (including cusp) about 226 µm long, cusp about 163 µm long, about 71 µm wide at level of seta le. Medial dens about 72 µm long, without teeth, lateral dens about 72 µm with 0 – 6 teeth on lateral margin. Bothridial setae 115 – 156 µm long, with barbed, fusiform head, rounded to tapered distally. Tutorium extending well anterior of rostrum, about 228 µm long of which cusp about 144 µm long, rectangular, distal margin with about 10 dens. Custodium about 62 µm long, tapered. Notogastral setae 72 – 86 µm long, lm posterior or posteromedial to Aa, lp anterior to A 1. Setal pair h 1 closely adjacent, directed posteriorly, blunt distally; distance h 1 – h 1 about 24 µm, equidistant to distance p 1 – p 1. Epimeral seta 3 c 75 µm, thickest and longest seta, subequal in shape to other epimeral setae. Mentum with transverse carina anteriorly; with tectum. Seta l ” of genu I about 53 µm, l ” of genu II about 62 µm. Tarsi heterotridactylous.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF8AFFDBFF2BFA68FED47D62.taxon	description	Description. Adult. Dimensions: Mean total length: female (n = 4) 631 µm (range 624 – 634); male (n = 4) 588 µm (range 576 – 595). Mean notogastral width: female (n = 2) 471 µm (461, 480); male (n = 3) 439 µm (range 432 – 442). Integument: Prodorsum, notogaster, genital and ventral plate micropunctate, mentum microtuberculate; short striae present on lenticulus and long striae on lateral of lamellae (Fig. 7) and in coxisternal region. Prodorsum: Rostral margin rounded to undulating with minute dens laterally (as in Fig. 2 F). Lamella (including cusp) about 226 µm long, cusp about 163 µm long, about 71 µm wide at level of seta le. Lamellar cusps contiguous, or not, anteromedially, separated posteromedially, leaving prodorsum visible through oval opening, about 62 µm long by up to 24 µm wide. Medial dens about 72 µm long without teeth; lateral dens about 72 µm with 0 – 6 teeth (Fig. 7) on lateral margin, varying among specimens and on either side of same specimen. Translamella without tooth, about 19 µm at greatest width, about 19 µm deep (Fig. 7). Setae ro about 120 µm long, strongly barbed along length, acuminate, strongly directly medially. Setae le about 96 µm long, thick, heavily barbed, tapered. Setae in about 211 µm long, thick (less so than le), heavily barbed, tapered; mutual distance of pair about 72 µm. Bothridial setae 115 – 156 µm long, with barbed, fusiform head, rounded to tapered distally, stalk short, smooth; head directed slightly anteromedially. Exobothridial setae thin, smooth, about 60 µm. Lateral aspect of podosoma: Genal tooth broad, subrectangular, rounded distally, without dens ventrodistally, with longitudinal ridge ventrally (as for Fig. 2 E). Tutorium extending well anterior of rostrum; about 228 µm long, of which cusp about 144 µm long, rectangular, distal margin with about 10 dens. Custodium about 62 µm long, tapered (Fig. 8). Porose area Al about 21 µm in diameter. Notogaster: Length subequal to width. Anterior margin undulating, convex lateral of bothridium, with 10 – 12 transverse ridges (Fig. 7). Pteromorph with ridges at anterior and ventral margins (Fig. 7); with or without small dens on anteroventral margin (Fig. 8). Porose areas large, about 17 µm in diameter, clearly defined. Ten pairs of long, barbed, tapered (other than seta h 1), notogastral setae present, 72 – 86 µm long, with c, la and h setae longest; lm posterior to posteromedial of Aa, and directed laterally, lp anterior of A 1. Setae h 1 closely adjacent, directed posteriorly, blunt distally (Fig. 7); distance h 1 – h 1 about 24 µm, subequal to distance p 1 – p 1. Lenticulus U-shaped, with fine short striae (Fig. 7). Ventral region: Epimeral setae mostly 24 – 36 µm long, setal length (in µm) approximate, 1 b 36, 2 a 24, 3 a, 24, 4 a 24; 3 c 75, thickest and longest seta and more barbed than 4 c 72, which subequal in shape to other epimeral setae, though more barbed. Genital, aggenital, anal and adanal setae smooth, about 10 – 14 µm long. Genital setae about 10 µm, positioned 1 + 5, with 1 seta on anterior margin of plate. Postanal porose area oval, 25 x 12 µm. Gnathosoma: Mentum with transverse carina anteriorly; with tectum (Fig. 8, as for Fig. 2 D). Axillary saccule about 8 x 3 µm. Legs: Setation (I to IV): trochanters, 1 - 1 - 2 - 1; femora, 5 - 5 - 3 - 2; genua, 3 (1) - 3 (1) - 1 (1) - 2; tibiae 4 (2) - 4 (1) - 3 (1) - 3 (1); tarsi, 20 (2) - 15 (2) - 15 - 12. Setae l ” of genu I about 53 µm, l ” of genu II about 62 µm. Tarsi heterotridactylous.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF8AFFDBFF2BFA68FED47D62.taxon	etymology	Etymology. This species is named in honour of A. P. Jacot, (1890 – 1939), the world-renowned acarologist, who was and is seminal to our knowledge of North American Oribatida. A short biographical overview of his life is given in Metz et al. (1977).	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF8AFFDBFF2BFA68FED47D62.taxon	discussion	Remarks. This species is similar in size and shape to O. brevicornuta from which it is easily distinguished by the closely adjacent, posteriorly directed setae h 1, and the distance h 1 – h 1 being subequal to the distance p 1 – p 1, about 24 µm.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF8AFFDBFF2BFA68FED47D62.taxon	distribution	Distribution and Ecology. This species is widely distributed throughout eastern North America, from Nova Scotia to Arkansas.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF96FFDBFF2BFE5CFA927BB3.taxon	materials_examined	Material examined. Topotypes: male and 3 females; USA, Missouri, Boone Co., Hinkson Creek, Columbia, S. U. Mo. Campus, 25. iv. 1985 FMHD # 85 – 127 (J. Kethley, R. A. Norton) from mixed deciduous litter on dry ridgetop (RNC). Other material examined. Arkansas, Montgomery Co., Little Missouri Falls Recreation Area, along trail SW of River, 19. vi. 1992 (Carlton & HWR) 3 from beech and maple litter; Polk Co., N slope Rich Mountain, below 272 – 82 intersection, 25. iii. 1992 (HWR) 4 from old-growth.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF96FFDBFF2BFE5CFA927BB3.taxon	diagnosis	Diagnosis. Total length 440 – 475 µm. Notogastral width 310 – 336 µm. Integument of prodorsum, notogaster, venter and mentum micropunctate, micropuncta widely spaced, about 2 – 4 µm apart (Fig. 9 D). Rostrum rounded in dorsal aspect, with 2 small lateral dens. Lamella (including cusp) about 144 µm long, cusp about 127 µm long, about 55 µm wide at level of insertion of seta le. Cusps contiguous or overlapping anteromedially, separated posteromedially, leaving prodorsum visible through oval opening, about 19 µm long and 12 µm wide (Fig. 9 B). Medial and lateral dens on lamellar cusp subequal, about 62 µm long. Medial dens without teeth; lateral dens with 3 – 4 teeth on lateral margin (Fig. 9 B), varying among specimens and on either side of same specimen. Longitudinal striae on lamella laterally, lamellar integument smooth medially (Fig. 9 B). Translamella without tooth, about 10 µm at greatest width, 5 µm deep. Setae ro about 110 µm long, strongly barbed along length, acuminate, strongly directly medially. Setae le about 106 µm long, thick, heavily barbed, tapered. Setae in about 173 µm long, thick (less so than le), heavily barbed, tapered; mutual distance of pair about 48 µm. Bothridial setae about 102 µm long, with barbed, fusiform to clavate head, rounded distally, stalk short, smooth; head directed anteriorly (Fig. 9 A, B). Exobothridial setae about 43 µm long, thin, barbed tapered. Genal tooth broad, subrectangular, rounded distally, without dens anteroventrally; with longitudinal ridge ventrally. Tutorium about 133 – 160 µm long, of which cusp about 65 – 80 µm long, rectangular, distal margin with 1 to 5 dens. Custodium about 38 µm long, tapered. Porose area Al about 10 µm in diameter. Notogastral length subequal to width. Anterior margin undulating, convex lateral of bothridium, with about 12 transverse ridges. Pteromorph with short ridges at anterior margin; with dens on anteroventral margin. Porose areas present, about 10 – 12 µm in diameter. Ten pairs of long, barbed, tapered notogastral setae present; 67 – 110 µm long, with c seta longest; lm medial of Aa, lp medial and slightly anterior of A 1 (Fig. 9 A). Distance setae h 1 – h 1 about 35 – 48 µm, wider than distance p 1 – p 1 about 25 – 29 µm. Subtriangular lenticulus present. Coxisternum with longitudinal striae. Epimeral seta 22 – 26 µm long, weakly barbed, other than 4 a, 4 b 42 – 44 µm, 3 c, 4 c 62 µm long, strongly barbed, 3 c subequal in shape and width to other epimeral setae, 4 c thickest seta. Genital setae 1 + 5, 1 pair of genital setae on anterior margin of plates, about 15 µm long. Aggenital setae about 30 µm long, anal and adanal setae about 38 µm long, strongly barbed. Postanal porose area oval 19 x 12 µm. Mentum with transverse carina anteriorly, without tectum. Axillary saccule about 4 x 2 µm. Legs setation (I to IV): trochanters, 1 - 1 - 2 - 1; femora, 5 - 5 - 3 - 2; genua, 3 (1) - 3 (1) - 1 (1) - 2; tibiae 4 (2) - 4 (1) - 3 (1) - 3 (1); tarsi, 20 (2) - 15 (2) - 15 - 12. Setae l ” of genua I and II about 53 µm. Tarsi heterotridactylous.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF96FFDBFF2BFE5CFA927BB3.taxon	discussion	Remarks. Like O. gigantea (see above), this species was described by Berlese (1916) based on specimens from “ Columbia (N. A.) ”, which caused consistent problems in the literature until their provenance was clarified as Columbia, Missouri by Norton and Kethley (1989, p. 422). These authors subsequently collected topotypes from this locality, which were examined (see above).	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF96FFDBFF2BFE5CFA927BB3.taxon	distribution	Distribution and Ecology. This species is known from deciduous litter from Missouri and Arkansas.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF91FFD2FF2BFA45FA227BC7.taxon	description	(Figs. 10 – 13)	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF91FFD2FF2BFA45FA227BC7.taxon	materials_examined	Material examined. Holotype: female USA: North Carolina, Durham Co., Duke Forest, 4. v. 1979 (L. Metz), deposited in the CNC, type number 23956. Paratypes: 7 (5 males, 2 females) with same data as holotype; North Carolina, Buncombe Co., Bent Creek Experimental forest (A. P. Jacot) (RNC) (2 males) (“ montum ” of Jacot, see Remarks); West Virginia, Mercer Co., 1.5 mi N on Brushcock Falls Trail, 13. vi. 1971 (W. Sheer) 1 female from deep litter near cliff (RNC); Missouri, Boone Co., Hinkson Creek, Columbia, S. U. Mo. Campus, 25. iv. 1985 FMHD # 85 – 127 (J. Kethley, R. A. Norton) 1 female from mixed deciduous litter on dry ridgetop (FM); Alabama, DeKalb Co., De Soto State Park, Lost Falls Trail 26. ix. 1992 (VBP) 1 female from moist maple litter by Lost Falls; same data except, 27. ix. 1992, Rhodendron Trail, 1 male from moss at base of hemlock.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF91FFD2FF2BFA45FA227BC7.taxon	diagnosis	Diagnosis. Total length of adult 275 – 290 µm. Rostral margin rounded, undulating in ventral aspect with 2 small lateral dens. Microtubercles aligned on striae on posterior of notogaster, on coxisternum, on genital plates and on ventral plate laterally and posteriorly of anal plates. Translamella without tooth. Lamella (including cusp) 105 – 109 µm long, cusp 72 – 77 µm long, about 38 µm wide at level of insertion of seta le. Medial dens on cusp about 31 µm long, without teeth; lateral dens about 37 µm long with at most 1 tooth on lateral margin. Bothridial seta 90 – 111 µm long, with barbed, fusiform head, tapered distally. Notogastral porose areas small, about 5 µm in diameter. Ten pairs of short, smooth notogastral setae present, 16 – 27 µm long, with c seta longest, setae positioned laterally; lm posterior of Aa, and directed laterally, lp anterior of A 1. Mutual distance p 1 – p 1 about 19 µm, subequal to distance h 1 – h 1. Aggenital setae absent. Tarsi monodactylous.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF91FFD2FF2BFA45FA227BC7.taxon	description	Description. Adult. Dimensions: Mean total length: female (n = 3) 288 µm (range 285 – 290); male (n = 5) 279 µm (range 275 – 280). Mean notogastral width: female (n = 3) 198 µm (range 195 – 200); male (n = 5) 188 µm (range 180 – 190). Integument: Prodorsum, notogaster, anal plates, genital plates, venter and mentum microtuberculate, microtubercles aligned on striae on posterior of notogaster, coxisternum, genital plates and on ventral plate laterally and posterior of anal plates (Fig. 10). With striae on tutorium, pteromorph and pedotectum I. Lamellae smooth medially, with longitudinal striae laterally (Fig. 10). Prodorsum: Rostrum rounded triangle in dorsal aspect; margin rounded, undulating in ventral aspect with 2 small lateral dens. (Fig. 11). Lamella (including cusp) 105 – 109 µm long, cusp 72 – 77 µm long, about 38 µm wide at level of insertion of seta le. Lamellar cusps contiguous anteromedially; separated posteromedially, leaving prodorsum visible through oval opening, about 14 µm wide x 21 µm long; translamella without tooth, about 11 µm at greatest width, 6 µm depth (Fig. 10). Medial dens on lamellar cusp about 31 µm long, without teeth; lateral dens about 37 µm long with at most 1 tooth on lateral margin. Long striae extending longitudinally along outer margin of lamella and cusp; lamella without striae medially (Fig. 10). Setae ro about 73 µm long, strongly barbed along length, acuminate, curved anteromedially (Fig. 11). Setae le about 57 – 66 µm long, thick, heavily barbed, tapered. Setae in 113 – 124 µm long, thick (less so than le), heavily barbed, tapered; mutual distance of pair 52 – 54 µm. Bothridial setae about 90 – 111 µm long, with barbed, fusiform head, tapered distally, stalk short, smooth; head directed slightly anterodorsally (Fig. 10). Exobothridial setae about 11 µm long, thin, smooth. Lateral aspect of podosoma: Genal tooth broad, subrectangular, with dens ventrodistally, with longitudinal ridge ventrally. Tutorium broad, rectangular about 97 µm long of which cusp about 54 µm long, rectangular, distal margin with 5 – 6 dens. Custodium about 26 µm long, extending to middle of pedotectum II (Fig. 11). Porose area Al about 10 µm in diameter. Notogaster: Length subequal to width. Anterior margin undulating, convex lateral of bothridium, with 5 – 9 transverse ridges. Pteromorph with striae; with or without small dens on anteroventral margin (Fig. 11). Octotaxic system in form of relatively small porose areas, about 5 µm in diameter. Ten pairs of short, smooth notogastral setae present, 16 – 27 µm long, with c seta longest, setae positioned laterally, so that lm posterior of Aa, and directed laterally, and lp anterior of A 1 (Fig. 10); distance p 1 – p 1 about 19 µm, subequal to distance h 1 – h 1 about 19 µm. Diffuse subtriangular lenticulus present (not illustrated). Ventral region: Epimeral setae mostly about 6 – 8 µm long, smooth, 4 c about 32 µm long, thick and heavily barbed. Genital, anal and adanal setae smooth, about 6 – 8 µm long; genital setae 3 + 3, 3 setae on anterior margin of plate. Aggenital setae absent. Lyrifissure iad anterolateral and almost parallel to anal plate. Postanal porose area oval 11 x 5 µm. Gnathosoma: Mentum with transverse carina anteriorly, with short tectum (Fig. 11). Axillary saccule about 4 x 2 µm. Legs: Setation (I to IV): trochanters, 1 - 1 - 2 - 1; femora, 5 - 5 - 2 / 3 - 2; genua, 3 (1) - 3 (1) - 1 (1) - 2; tibiae 4 (2) - 4 (1) - 3 (1) - 3 (1); tarsi, 20 (2) - 15 (2) - 15 - 12. Setae l ” on genua I and II 21 µm; l ” on tibiae I and II 14 µm. Tarsi monodactylous. Description. Immatures. Dimensions: Mean length: larva (n = 1) 200 µm; deutonymph (n = 1) 209 µm; tritonymph (n = 7) 282 µm (range 275 – 290). Larva. Integument weakly microtuberculate. Prodorsum: Setae ro le, in and ex long, barbed, tapered, about 50, 70, 80 and 70 µm long, respectively. Mutual distance of pair ro about 9 µm, of pair le about 10 µm and of pair in about 30 µm. Setae ex directed laterally, other prodorsal setae directed anteriorly or anterolaterally (Fig. 12). Bothridial seta fusiform, heavily barbed, about 80 µm long, tapered distally (Fig. 12). Gastronotic region: Margin carinate except anteriorly; outline uneven, caused by weak swelling around setal tubercles. Twelve pairs of setae, long, barbed, tapered, subequal in shape. Setal lengths (in µm) approximate (due to some terminal breakage and difficulty in measurement): c 1 (92), c 2 (90), c 3 (90), da (100), dm (90), dp (70), la (80), lm (80), lp (60), h 1 (?), h 2 (?), h 3 (27). Tritonymph: Integument of gastronotal region weakly microtuberculate medially, with short striae laterally. Integument of prodorsum weakly microtuberculate. Prodorsum: Setae ro le, in and ex barbed, tapered, about 38, 59, 66 and 45 µm long, respectively. Mutual distance of setae ro about 15 µm, of setae le about 16 µm and of setae in about 33 µm. Setae ex directed laterally, other prodorsal setae directed anteriorly or anterolaterally (Fig. 13). Bothridial seta bacilliform, heavily barbed, about 76 µm long, blunt distally (Fig. 13). Gastronotic region: Margin carinate except anteriorly; outline slightly uneven, caused by weak swelling around setal tubercles (Fig. 13). Setae barbed, tapered, with c 1 thinnest seta and da thickest seta; dm and dp absent (Fig. 13). Setae c 1, c 2, da, directed posteriorly; c 1 generally lying beneath scalps of previous instars. Setae c 3 la, lm, lp, h 3, h 2 directed posterolaterally. Setal lengths (in µm) approximate (due to some terminal breakage and difficulty in measurement): c 1 (23), c 2 (36), c 3 (41), da (30), la (42), lm (40), lp (37), h 1 (30), h 2 (32), h 3 (34), p 1 (26), p 2 (22), p 3 (22). Ventral surface of scalps with pair of setiform, sheathlike callosities, accommodating seta da of preceding instar; sheaths browner, more sclerotized than rest of scalp. Ventral region: Epimeral plates contiguous medially. Epimeral setation 3 - 1 - 3 - 3; all smooth, about 6 µm. Five pairs of genital setae, about 6 µm, aligned in longitudinal row. Aggenital seta absent. Three pairs of adanal setae barbed, about 9 – 13 µm; two pairs of anal setae barbed, about 9 µm; cupule iad present. Axillary saccule present, about 4 x 2 µm. Other nymphal instars: Similar to tritonymph in form and proportions, except as follows. Setae of d series of deutonymph as for tritonymph, i. e., setae dm and dp absent. Setae of d series of protonymph (observation from protonymphal scalp; no specimen available) represented by da, similar in shape to that of tritonymph, about 24 µm long and dp, similar in shape to l series, about 38 µm long; setae dm absent; distance setal bases da and dp about 74 µm, three times length da. Legs: Ontogeny of leg setae and solenidia for known nymphs and adult given in Table 2.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF91FFD2FF2BFA45FA227BC7.taxon	etymology	Etymology. This species in named in honour of the late Dr. Louis J. Metz, who contributed extensively to oribatid mite research and soil faunal studies in North America.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF91FFD2FF2BFA45FA227BC7.taxon	discussion	Remarks. This species made it necessary to modify the diagnosis of Oribatella (see above) for characters relating to the ontogeny of gastronotic setae. In other species the protonymph, deutonymph and tritonymph have 15 pairs of gastronotal setae (adult loses at least c 1). Oribatella metzi is unique among Oribatella, and among all known brachypyline Oribatida, in that deutonymphal and tritonymphal gastronotal setal loss differs from that of the protonymph, the protonymph having 14 pairs of gastronotal setae (seta dm lost) and the deutonymph and tritonymph with 13 pairs of gastronotal setae (setae dm and dp lost). The development of leg setae is similar to that given for Oribatella canadensis (Behan-Pelletier & Eamer 2010), which is the only species of Oribatella for which this is known. The only clear exception is that seta l’ is deutonymphal on tibia III and tritonymphal on tibia IV (both form in adult in O. canadensis). In 1 tritonymph, femur III on 1 side bears seta l’. Jacot frequently labeled slides with names that were used in internal USDA reports, but which were never published, such as ‘ montum’ noted in the Material Examined Section.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF91FFD2FF2BFA45FA227BC7.taxon	distribution	Distribution and Ecology. This species is known only from litter in mideastern states of the USA (Table 1).	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF9EFFD4FF2BFF55FCD57BCD.taxon	materials_examined	Material examined. Holotype male (MCZ 92834), USA: New York, Sea Cliff, under hemlock bark. Other material examined. New York, Onondaga Co., CESF, Lafayette Experimental Station, Lafayette Road, 31. x. 1973 (J. Philips) 1 from decomposing bald eagle pellet, specimen compared with type by R. A. Norton (RNC); Wisconsin: Northern Highland State forest near Trout Lake LTER, Star Lake Nature Trail, 46 ° 02 ’ N 89 ° 28 ’ W, 25. x. 1998 (VBP and M. Behan) 1 from polypore fungus on oak; Illinois: White Heath, 25. i. 1907 (J. D. Hood) 1 from under bark on soft maple tree; Missouri: Lake of the Ozarks State Park, Woodland Trail, elv. 900 ft., 14. v. 1999 (VBP) 2 from barren, rocky area in forest with moss, reindeer moss and lichen and oak litter; 2 from litter at base of large oak; Canada: Ontario: Leeds-Grenville Co., nr. Otter Lake, 44 ° 34.87 ’ N 76 ° 19.77 W, 23. vii. 2003 (J. Chen, J. Johnson, VBP) 1 from epiphytes on trunk; 2 mi E Dunrobin, 23. iii. 1978 (EEL) 1 from under bark of elm; Point Pelee National Park, 13. viii. 1974 (EEL) 1 from oak-juniper litter on sand; St. Laurence Islands National Park, Mcdonald Island, 30. viii. 1976 (IMS) 1 from litter and soil; Rondeau Provincial Park, 9. viii. 1974 (EEL) 1 from rotten stump; Québec, Gatineau Park, 27. ix. 1967 (W. G. Matthewman) 1 from Fomes fomentarius; New Brunswick: Kouchibouguac N. P. 28. vii. 1978 (IMS) 1 from litter in basal hole of black locust; same data except 1 from litter and soil in basal hole in red oak; same data except (S. J. Miller) 1 from rotten apple tree litter; same data, except 26. vii. 1978 (IMS), 1 from beneath bark of fallen beech; same data except 27 – 29. ix. 1977 (IMS) 1 from decaying wood and litter in fir stump.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF9EFFD4FF2BFF55FCD57BCD.taxon	diagnosis	Diagnosis. Total length of adult 300 – 340 µm. Integument of notogaster, ventral and anal plates reticulate with interspersed micropuncta and microtubercles (Fig. 14 A, B). Integument of prodorsum, lamella, tutorium and pedotectum I with distinct foveae (Fig. 14 C). Integument of rostrum and mentum with small reticulate pattern (Fig. 14 D). Rostrum rounded in dorsal aspect, with small U-shaped indentation medially (Fig. 14 D). Lamella (including cusp) about 127 µm long, cusp about 79 µm long, about 48 µm wide at level of insertion of seta le. Cusps contiguous or overlapping anteromedially, separated posteromedially, leaving prodorsum visible through oval opening, about 10 x 10 µm. Medial and lateral dens on lamellar cusp subequal, about 48 µm long. Medial dens without teeth, lateral dens with 1 – 3 teeth on lateral margin, varying among specimens and on either side of same specimen. Lamella without striae. Translamella without tooth, about 10 µm at greatest width, 10 µm deep. Setae ro about 75 µm long, strongly barbed along length, acuminate, strongly directly medially. Setae le about 120 µm long, thick, heavily barbed, tapered. Setae in about 134 µm long, thick (less so than le), heavily barbed, tapered; mutual distance of pair about 51 µm. Bothridial setae about 99 µm long, with barbed, fusiform to clavate head, rounded distally, stalk short, smooth; head directed anteriorly (Fig. 14 C). Exobothridial setae about 32 µm long, thin, barbed. Genal tooth broad, subrectangular, with dens ventrodistally, with longitudinal ridge ventrally. Tutorium about 131 µm long of which cusp about 51 µm long, rectangular, distal margin with 4 to 5 dens. Custodium very small, about 6 µm, triangular (Fig. 14 E). Porose area Al about 8 µm in diameter. Notogastral length subequal to width. Anterior margin undulating, convex lateral of bothridium, with about 10 transverse ridges. Pteromorph with small dens on anteroventral margin. Porose areas present, about 6 µm in diameter. Ten pairs of barbed, tapered notogastral setae present, 37 – 65 µm long, with c longest; lm medial to posteromedial of Aa, lp anterior and slightly anteromedial of A 1. Distance setae h 1 – h 1 about 26 µm, slightly wider than distance p 1 – p 1, about 19 µm. Small U-shaped lenticulus present. Coxisternum with short striae. Epimeral setae mostly 25 µm long, weakly barbed, 3 b, 3 c about 40 µm long, subequal in length, 4 c about 48 long, thicker and more heavily barbed than other epimeral setae (Fig. 14 E and insert). Genital, aggenital, anal and adanal setae weakly barbed, about 9 – 14 µm long. Genital setae 2 + 4, 2 pairs of genital setae on anterior margin of genital plates. Postanal porose area oval 30 x 12 µm. Mentum with transverse carina anteriorly, without tectum (Fig. 14 D arrow). Axillary saccule about 4 x 2 µm. Leg setation (I to IV): trochanters, 1 - 1 - 2 - 1; femora, 5 - 5 - 2 - 2; genua, 3 (1) - 3 (1) - 1 (1) - 2; tibiae 4 (2) - 4 (1) - 3 (1) - 3 (1); tarsi, 20 (2) - 15 (2) - 15 - 12. Setae l ” of genu I about 31 µm, l ” of genu II about 40 µm. Tarsi heterotridactylous.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF9EFFD4FF2BFF55FCD57BCD.taxon	discussion	Remarks. This species may be confused in the literature with the widely distributed O. reticulata (Diagnosis below), which also has polygonal sculpture on the notogaster. The two species differ by the following character states (those of reticulata in parentheses): Integument of pedotectum I with dense small foveae, without distinct reticulation of notogaster (integument of pedotectum I reticulate, similar to that of notogaster). Notogastral seta c about 50 – 65 µm long, weakly barbed, directed laterally (c about 80 – 90 µm long, strongly barbed, closely following curvature of body); seta lm medial to Aa (seta lm posteromedial to Aa)	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF9EFFD4FF2BFF55FCD57BCD.taxon	distribution	Distribution and Ecology. This species is distributed throughout central and eastern North America (Table 1). It has also been recorded from Oregon (see Marshall et al. 1987).	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF98FFEBFF2BFF55FD547BCA.taxon	description	(Figs. 15 – 18, 19 A, B)	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF98FFEBFF2BFF55FD547BCA.taxon	materials_examined	Material examined. Holotype: adult female. USA: Alabama: Lee Co., nr. Auburn in coastal plain, 7. xi. 1975 (unknown), RAN 75 – 150; deposited in the CNC, type number 23957. Paratypes: 20 (15 females, 5 males) with same data as holotype; deposited in the CNC, RNC and the FM. Other material examined. New York, Newcomb, Lake Harris Campground, i. vii. 1971 (EEL) 1 from moss on tree trunk; Arkansas, Polk Co., N. slope Rich Mountain, below 272 – 82 intersection, 25. iii. 1992 (HWR) 4 from oldgrowth; Canada, New Brunswick, Kent Co., Kouchibouguac National Park, 21. vii. 1978 (IMS) 3 from moss and litter at base of red oak (living); same data except 3 from bark and litter at base of red oak (dead); same data except, 15. vi. 1978 (R. Cope) 1 from moose dung in mixed woods; same data except, 9. viii. 1977 (EEL) 2 from mixed deciduous litter.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF98FFEBFF2BFF55FD547BCA.taxon	diagnosis	Diagnosis. Length of adult 295 – 320 µm. Rostrum flattened medially with minute lateral teeth. Translamella without tooth, about 9 µm at greatest width, 13 µm at greatest depth. Medial dens on lamellar cusp about 7 – 10 µm long, without marginal teeth, less than third length lateral dens; latter about 31 µm long, without marginal teeth. Bothridial setae about 100 µm long, with barbed, long bacilliform head, tapered distally, stalk short, smooth; head directed slightly anterodorsally. Ten pairs of short, smooth notogastral setae present, 24 to 41 µm long, with c seta longest, setae lm medial to Aa, lp anteromedial to A 1; distance h 1 – h 1 about 27 µm, wider than distance p 1 – p 1 about 21 µm. Epimeral seta 3 c barbed, about 32 µm, and 4 c smallest, thinnest epimeral seta, about 8 µm long. Genital setae in single curved line, or 2 + 4. Mentum with thickened, reverted transverse ridge anteriorly, with tectum. Femur III with 2 setae, l’ absent. Tarsi monodactylous.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF98FFEBFF2BFF55FD547BCA.taxon	description	Description. Adult. Dimensions: Mean total length female (n = 10) 317 µm (range 310 – 320), mean total length male (n = 9) 301 µm (range 295 – 310). Mean notogastral width female (n = 3) 208 (range 205 – 210); mean notogastral width male (n = 4) 208 µm (range 200 – 225). Integument: Prodorsum, notogaster, venter and mentum faintly micropunctate. Coxisternum, lamellae and pedotectum I with fine striae, lamella laterally with strong striae (Fig. 15). Prodorsum: Rostrum flattened medially with minute lateral teeth (Fig. 16). Lamella (including cusp) about 118 µm long, cusp about 70 µm long, about 41 µm wide at level of insertion of seta le. Lamellar cusps contiguous, or not, anteromedially, separated posteromedially, leaving prodorsum visible through long oval opening, 9 µm wide x 16 µm long; translamella without tooth, about 9 µm at greatest width, 13 µm at greatest depth (Fig. 15). Medial dens on lamellar cusp about 7 – 10 µm long, without marginal teeth, less than third length lateral dens; latter about 31 µm long, without marginal teeth (Figs. 15, 19 A). Setae ro about 80 µm long, strongly barbed along length, acuminate, curved anteromedially. Setae le about 93 µm long, thick, heavily barbed, tapered. Setae in about 133 µm long, thick (less so than le), heavily barbed, tapered; mutual distance of insertions of pair about 47 µm. Bothridial setae about 100 µm long, with barbed, long bacilliform head, tapered distally, stalk short, smooth; head directed slightly anterodorsally (Fig. 15). Exobothridial setae about 20 µm long, thin, acuminate. Lateral aspect of podosoma: Genal tooth broad, subrectangular, with dens ventrodistally, with longitudinal ridge ventrally (Fig. 19 B). Tutorium about 120 µm long of, which cusp about 72 µm long, rectangular; distal margin variable, with distinct dorsal and ventral dens (Fig. 19 B), or with 6 – 10 dens along anterodorsal and distal margin. Custodium about 29 – 40 µm long, tapered (Fig. 16). Porose area Al about 11 µm in diameter. Notogaster: Length subequal to width. Anterior margin undulating, convex lateral of bothridium, with 5 – 7 transverse ridges. Pteromorph with striae along margin; with small dens on anteroventral margin. Octotaxic system in form of small porose areas, about 7 µm in diameter. Ten pairs of short, smooth notogastral setae present; 24 to 41 µm long, with c seta longest, setae positioned medially and laterally, lm medial to Aa, lp anteromedial of A 1; distance h 1 – h 1 about 27 µm, wider than distance p 1 – p 1, about 21 µm (Fig. 15). Subtriangular lenticulus present. Ventral region: Seta 3 c largest epimeral seta, barbed, about 32 µm, 4 c smallest, thinnest, about 8 µm long; other epimeral setae mostly 14 – 18 µm long, smooth. Genital, aggenital, anal and adanal setae weakly barbed, about 11 µm long. Genital setae in single curved line or 2 + 4. Lyrifissure iad anterior of anterolateral corner of anal plates. Postanal porose area oval 18 x 6 µm. Gnathosoma: Mentum with thickened, reverted transverse ridge anteriorly, with tectum. Axillary saccule about 5 x 2 µm. Legs: Setation (I to IV): trochanters, 1 - 1 - 2 - 1; femora, 5 - 5 - 2 - 2; f, 3 (1) - 3 (1) - 1 (1) - 2; tibiae 4 (2) - 4 (1) - 3 (1) - 3 (1); tarsi, 20 (2) - 15 (2) - 15 - 12. Seta l’ absent from femur III. Setae l ” on genua I and II 22 - 24 µm. Tarsi monodactylous. Description. Immatures. Dimensions: Length: larva (n = 1) (specimen distorted, not measured); protonymph (n = 1) 235 µm; tritonymph (n = 1) 290 µm. Larva. Prodorsum: Setae ro le, in and ex strongly barbed, tapered, in thickest seta, about 32, 49, 73 and 37 µm long, respectively. Mutual distance of setae ro about 9 µm, of setae le about 13 µm and of setae in about 20 µm. Setae ex directed laterally, other prodorsal setae directed anteriorly or anterolaterally (Fig. 17). Bothridial seta setiform, heavily barbed, about 80 µm long, almost blunt distally (Fig. 17). Gastronotic region: Rounded; outline slightly uneven, caused by swelling around setal tubercles (Fig. 17). Humeral organ as for tritonymph (Fig. 17 arrow). Gastronotal setae, other than h 2, long, broad, heavily barbed, tapered, seta h 2 thin, weakly barbed, acuminate; seta h 1 absent; all setae, other than h 2, directed posteriorly, h 2 directed laterally; setae c 1, da and dm overlapping in larva and on larval scalps carried by protonymph. Setal lengths (in µm) approximate (due to difficulty in measurement): c 1 (78), c 2 (81), c 3 (54), da (52), dm (49), dp (36), la (48), lm (44), lp (35), h 3 (32), h 2 (21); distance da – da and dm – dm subequal 14 – 15 m, distance dp – dp about 23 µm. Ventral region: Epimeral setation 3 - 1 - 2; setae all smooth, about 5 µm, except 1 c scaliform. Tritonymph. Integument: weakly sclerotized; weakly microtuberculate. Prodorsum: Setae ro le, in and ex broad, strongly barbed, tapered, about 36, 84, 90 and 60 µm long, respectively. Mutual distance of setal pair ro about 12 µm, of pair le about 17 µm and of pair in about 38 µm. Setae ex directed laterally, other prodorsal setae directed anteriorly or anterolaterally (Fig. 18 A). Bothridial seta setiform, heavily barbed, about 120 µm long (Fig. 18 A). Gastronotic region: Margin carinate except anteriorly; outline slightly uneven, caused by weak swelling around setal tubercles (Fig. 18 A). Two oval porose regions closely medial to each seta lp; about 13 µm at widest dimension (not illustrated). Opisthonotal gland opening ventromedial to seta lp (Fig. 18 B). Humeral organ present as small saccule 3 x 3 µm, ventral to seta c 3 (Fig. 18 A, arrow). Setae c 2 broken from specimen examined. Other gastronotal setae long, broadened, heavily barbed, tapered; c 1, da, directed posteriorly. Setal lengths (in µm) approximate (due to some terminal breakage and difficulty in measurement): c 1 (45), c 2 (broken), c 3 (108), da (75), dm (90), dp (50), la (105), lm (110), lp (108), h 1 (97), h 2 (81), h 3 (103), p 1 (52), p 2 (47), p 3 (24). Distance da – da about 22 µm, dm – dm about 42 µm and dp – dp about 82 µm; c 1 and dp broadest setae, subequal in shape and length; da narrowest seta, subequal in shape to bo; setae p 1 and p 2 subequal in size and shape, broader than p 3. Ventral surface of scalps with pair of sheathlike callosities, accommodating seta da of previous instar; sheaths browner, more sclerotized than rest of scalp. Ventral region: Epimeral plates contiguous medially. Epimeral setation 3 - 1 - 3 - 3; all smooth, about 5 µm, except 3 c barbed, about 8 µm. Five pairs of genital setae, about 6 µm, aligned in longitudinal row. Aggenital seta smooth, about 8 µm. Three pairs of adanal setae about 8 µm, ad 1 barbed, ad 2 and ad 3 smooth (Fig. 18 B); two pairs of anal setae smooth, about 5 µm; cupule iad present. Axillary saccule present, about 4 x 2 µm. Legs: Setae l ” of femur, genu and tibia I, II and l’ of genu III very broad, barbed, spinous, almost blunt distally. Protonymph. Similar to tritonymph in form and proportions. Epimeral setation 3 - 1 - 2 - 1. Paraprocts atrichous in protonymph. Scalps of protonymph with molded integument to accommodate setae da of larval scalp. Legs: Ontogeny of leg setae and solenidia for known immatures and adult given in Table 3.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF98FFEBFF2BFF55FD547BCA.taxon	etymology	Etymology. This species is named in honour of my friend, colleague and preeminent expert on oribatid mites, Dr. Roy A. Norton.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF98FFEBFF2BFF55FD547BCA.taxon	discussion	Remarks. Adults of Oribatella nortoni sp. nov. are very similar to those of O. sexdentata, described from Italy on the basis of a single specimen (Berlese 1916), see also Mahunka and Mahunka-Papp (1995). This species was redescribed by Bernini (1977) and Chistyakov (1984 a), and is keyed to species in Bernini (1978) and in Weigmann (2006). The redescription of this species by Bernini (1977) and Chistyakov (1984 a) is used for comparison herein, and character states for O. sexdentata are in parentheses below. In O. nortoni sp. nov. seta bo is tapered distally (blunt distally); notogastral seta lm is medial of Aa (posterior to posteromedial of Aa: Bernini 1977, his Fig. XII b; Chistyakov 1984 a, his Fig. 13; see also, Weigmann 2006, his Fig. 193 a and Shtanchaeva & Subías 2009, their Fig. 7). Epimeral seta 4 c is the smallest, thinnest epimeral seta in O. nortoni (a character state also found in O. eutricha Berlese, 1908 known from Italy); unfortunately, this character is broken on the type of O. sexdentata (Bernini 1977) and is not illustrated in Chistyakov (1984 a). The immatures of O. sexdentata were described by Chistyakov (1984 a). These differ markedly from immatures of O. nortoni in the shape of gastronotal setae. Furthermore, seta c 1 of all nymphs of O. sexdentata are smooth and shorter than other gastronotal setae, whereas in known nymphs of O. nortoni seta c 1 are equally well barbed and broad as other gastronotal setae. Bernini (1977) questioned the record of O. sexdentata from Virginia, USA (Sengbusch 1957). It is possible that this record related instead to O. nortoni. However, Sengbusch’s specimens are not available, so both species are included in the key to species (see below). Development of leg setae is similar to that given for Oribatella canadensis (Behan-Pelletier & Eamer 2010) except on leg II, v’ is tritonymphal on the genu and pair (v) are tritonymphal on the tibia (adult in O. canadensis); on leg III, l’ is absent from the femur; and on legs III and IV, (l) is tritonymphal on the tibia (adult in O. canadensis).	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FF98FFEBFF2BFF55FD547BCA.taxon	distribution	Distribution and Ecology. This species is known only from a few localities in eastern North America from New Brunswick, Canada to Alabama, USA (Table 1).	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFA1FFEDFF2BFABCFB637F9D.taxon	materials_examined	Material examined. Cotypes: (MCZ No. 30702 (2 females), 30703 (1 female), 30704 (1 female): USA, Maryland, Plummer’s Id, (H. S. Barber) from deep layer of old leaves (MCZ); North Carolina, Buncombe Co., Bent Creek Experimental Forest, from A. P. Jacot Collection, slides 35 F 4.2 - 27 (2 females) and 35 F 4 X- 33 (17 specimens) (RNC).	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFA1FFEDFF2BFABCFB637F9D.taxon	diagnosis	Diagnosis. Total length of adult 405 – 455 µm. Integument of notogaster, ventral and anal plates micropunctate, coxisternal region with fine striae. Rostrum strongly projecting over gnathosoma, margin undulating, with or without pair of minute dens laterally. Lamella (including cusp) about 157 µm long, cusp 106 – 118 µm long, about 48 – 52 µm wide at level of insertion of seta le. Cusps contiguous or overlapping anteromedially; separated posteromedially, leaving prodorsum visible through oval opening, about 29 µm at greatest width (Fig. 19 D). Medial and lateral dens on lamellar cusp subequal, about 48 µm long. Medial dens without teeth, lateral dens with 0 – 3 teeth on lateral margin, varying among specimens and on either side of same specimen. Lamellae without striae. Translamella without tooth, about 24 µm at greatest width, 17 µm deep (Fig. 19 D). Setae ro about 89 µm long, strongly barbed along length, acuminate, strongly directly medially. Setae le about 74 µm long, thick, heavily barbed, tapered. Setae in 137 – 178 µm long, thick (less so than le), heavily barbed, tapered; mutual distance of pair about 87 µm. Bothridial setae about 121 µm long, barbed, similar in shape to seta le but more spindle-shaped. Exobothridial setae about 29 µm long, thin, barbed tapered. Genal tooth broad, subrectangular, with dens ventrodistally, with longitudinal ridge ventrally. Tutorium about 156 µm long, of which cusp about 84 µm long, rectangular, distal margin with 5 dens. Custodium about 53 µm long, tapered, extending anterior of pedotectum II, directed slightly anteromedially (Fig. 19 C). Porose area Al about 10 µm in diameter. Notogastral length subequal to width. Anterior margin undulating, convex lateral of bothridium, with about 6 transverse ridges. Pteromorph with short ridges at anterior margin; with small dens on anteroventral margin. Four pairs of porose areas, Aa about 14 µm in diameter. Ten pairs of barbed, tapered notogastral setae present, about 62 µm long; lm posteromedial of Aa, lp anterior and slightly anteromedial of A 1. Distance setae h 1 – h 1 about 43 – 50 µm, wider than distance p 1 – p 1, 24 – 29 µm. Small U-shaped lenticulus present. Coxisternum with longitudinal striae. Epimeral setae mostly 22 µm long, weakly barbed, except 3 c 58 µm long, subequal in shape and width to other epimeral setae. Genital, aggenital, anal and adanal setae weakly barbed, about 21 µm long. Genital setae 1 + 5, 1 pair of genital setae on anterior margin of genital plates. Postanal porose area oval, 17 µm long. Mentum with transverse carina anteriorly, with short tectum. Axillary saccule about 4 x 2 µm. Leg setation (I to IV): trochanters, 1 - 1 - 2 - 1; femora, 5 - 5 - 2 - 2; genua, 3 (1) - 3 (1) - 1 (1) - 2; tibiae 4 (2) - 4 (1) - 3 (1) - 3 (1); tarsi, 20 (2) - 15 (2) - 15 - 12. Seta l ” of genu I about 31 µm. Tarsi monodactylous.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFA1FFEDFF2BFABCFB637F9D.taxon	discussion	Remarks. Lateral dens of lamellar cusps lacked teeth on all cotype specimens, but up to 3 were present on non-type specimens. Oribatella plummeri was first proposed as a subspecies of O. brevicornuta by Jacot (1934), and subsequently given species status by Johnston (1965). It is clearly distinguishable from O. brevicornuta by the width of the oval opening between lamellar cusps being about 29 µm (17 - 19 µm in O. brevicornuta), and the monodactylous tarsi (tridactylous in O. brevicornuta).	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFA1FFEDFF2BFABCFB637F9D.taxon	distribution	Distribution and Ecology. This species is known only from Maryland and North Carolina.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFA0FFEEFF2BFBC4FB137E11.taxon	materials_examined	Material examined. 2 topotype males, USA, Missouri, Boone Co., Hinkson Creek Recreation Area, Columbia, S. U. 29. iv. 1985 FMHD # 85 – 164 (J. Kethley, R. A. Norton) from deciduous litter in rock crevices; compared with type by RAN 19. viii. 1988 (see Remarks) (RNC).	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFA0FFEEFF2BFBC4FB137E11.taxon	diagnosis	Diagnosis. Total length 2 topotype males 315, 340 µm; notogastral width about 225 µm. Integument of prodorsum, notogaster, including pteromorph, venter and mentum microtuberculate; coxisternum with fine striae, striae laterally thicker. Rostral margin undulating medially, with pair of small lateral dens. Lamella (including cusp) about 110 µm long, cusp about 83 µm long, about 43 µm wide at level of seta le. Lamellar cusps contiguous anteromedially, leaving prodorsum visible through oval opening, about 12.5 µm wide x 15 µm long (Fig. 19 E). Medial dens of cusp about 40 µm long, lateral dens about 45 µm long; medial dens without teeth, lateral dens with 4 – 6 teeth on lateral margin, varying among specimens and on either side of same specimen. Long striae extending longitudinally on outer margin of lamella and cusp; short, fine longitudinal striae on lamella medially (Fig. 19 E). Translamella without tooth, about 8 µm at greatest width, about 15 µm deep (Fig. 19 E arrow). Setae ro about 80 µm long, strongly barbed along length, acuminate, strongly directly medially. Setae le about 75 µm long, thick, heavily barbed, tapered. Setae in about 120 µm long, thick (less so than le), heavily barbed, tapered; mutual distance of pair about 37 µm. Bothridial setae about 91 µm long, with barbed, bacilliform head, rounded distally, stalk short, smooth; head directed slightly anteromedially. Exobothridial setae thin, smooth, about 12 µm. Genal tooth broad, subrectangular, rounded distally, with strong dens ventrodistally, with longitudinal ridge ventrally. Tutorium about 113 µm long of which cusp about 64 µm long, rectangular, distal margin with 5 to 7 dens. Custodium about 30 µm long tapered. Porose area Al about 10 µm in diameter. Notogastral length subequal to width. Anterior margin undulating, convex lateral of bothridium, with 7 – 8 transverse ridges. Pteromorph with 2 – 3 small teeth along distal margin. Ten pairs of short, thin, smooth notogastral setae present; 16 to 31 µm long, with c seta longest, setae positioned laterally, lm posteromedial of Aa, lp anterior of A 1. Distance setae h 1 – h 1 about 33 µm, almost twice distance p 1 – p 1, about 18 µm. Faint triangular lenticulus present. Epimeral setae mostly 8 µm long, finely barbed 4 a about 18 µm, 3 b, 3 c about 22 µm, 4 c about 25 µm long, subequal in shape, but more distinctly barbed than other setae. Genital setae about 8 µm finely barbed, 1 + 5, 1 seta on anterior margin of plate. Aggenital, anal and adanal setae roughened, about 6 µm long. Postanal porose area oval about 13 x 6 µm. Mentum without transverse carina anteriorly, with small tectum extending over base of gena medially. Axillary saccule about 4 x 2 µm. Leg setation (I to IV): trochanters, 1 - 1 - 2 - 1; femora, 5 - 5 - 2 - 2; genua, 2 (1) - 2 (1) - 1 (1) - 2; tibiae 4 (2) - 4 (1) - 3 (1) - 3 (1); tarsi, 20 (2) - 15 (2) - 15 - 12. Setae l ” of genu I about 25 µm, l ” of genu II about 37 µm. Tarsi heterotridactylous.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFA0FFEEFF2BFBC4FB137E11.taxon	discussion	Remarks. Two topotypic males are housed in the RNC, one slide-mounted and one in ethanol. When these males were compared with type material by Roy A. Norton on 19. viii. 1988, he considered these specimens conspecific. Subsequently, in 1989, he reversed this decision (according to a note inserted with one male specimen in ethanol) and considered these specimens to represent different species. I have examined these 2 male specimens and consider them conspecific. The differences noted by R. A. Norton, i. e., rostrum not pointed in one specimen and small variation in lamellar bridge, seem attributable to variation between specimens and orientation of the slide mounted specimen. In addition, there is variation in bothridial setal shape between the two specimens.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFA0FFEEFF2BFBC4FB137E11.taxon	distribution	Distribution and Ecology. This species is known only from the type locality in Missouri.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFA3FFEFFF2BFD44FD667DD3.taxon	materials_examined	Material examined: Canada, Newfoundland, St. John’s, 5. viii. 1976 (EEL) 3 from weeds, moss, sod, by harbour edge; Prince Edward Island, Cavendish, 21. viii. 1968 (EEL) 1 from litter under bushes, primarily Ledum; New Brunswick, Kouchibouguac National Park, 8. viii. 1977 (EEL) 1 from sedges in saltmarsh; same data except, 28. vii. 1978 (IMS) 2 from litter in basal hole in black locust.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFA3FFEFFF2BFD44FD667DD3.taxon	diagnosis	Diagnosis. Total length of adult 490 - 525 µm. Integument of prodorsum, notogaster, anal and ventral plate micropunctate, mentum punctuate to striate; striae present on lamellae, pedotectum I, coxisternal region, and genital plates. Rostrum with distinct crest in dorsal and lateral aspect (Bernini 1975 his figs 9 o-q). Rostral margin rounded to undulating with or without minute dens laterally (Bernini 1975 his figs 8 e, f). Lamellar cusps about half length of lamella; medial dens without teeth subequal in length to lateral dens, lateral dens with about 2 teeth on lateral margin, number of lateral teeth varying among specimens and on either side of same specimen. Translamella with tooth, rounded to triangular in shape. Bothridial setae with barbed, fusiform head, rounded to tapered distally. Seta ex short and smooth. Genal tooth broad, subrectangular, rounded distally, without dens ventrodistally, with longitudinal ridge ventrally. Tutorium extending anterior of rostrum, cusp rectangular, distal margin with about 5 - 9 dens (Bernini 1975, his figs 8 a, b). Custodium tapered, about half to two-thirds length seta 4 c (Bernini 1975 his figs 8 c, 10 i-s). Anterior margin of notogaster undulating, convex lateral of bothridium, with about 10 transverse ridges. Notogastral setae barbed, acuminate, lm posterior or posteromedial to Aa, lp anterior to A 1. Setal pair h 1 distinctly directed posteriorly, tapered distally; distance h 1 – h 1 equidistant to distance p 1 – p 1. Epimeral seta 4 c thickest and longest epimeral seta, seta 3 c slightly thicker than other epimeral setae, other than 4 c. Genital setae 2 + 4, 2 setae on anterior margin of genital plate. Mentum with transverse carina anteriorly; with tectum (Bernini 1975, his Fig. IV 4). Tarsi heterotridactylous.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFA3FFEFFF2BFD44FD667DD3.taxon	discussion	Remarks. Oribata quadricornuta was redescribed thoroughly by Bernini (1975) based on examination of type material, and his redescription forms the basis for the diagnosis given above. As he noted this species often has been confused in the literature with O. calcarata. Bernini (1975) noted variability in a number of characters (noted in diagnosis), but all specimens showed setal pair h 1 distinctly directed posteriorly, translamella with tooth and the long, thick, barbed seta 4 c. In eastern North America O. quadricornuta is most similar to O. jacoti sp. nov. from which it differs in overall size, the presence of translamellar tooth, and shape of seta 4 c. This species has been recorded from Alaska and Virginia in the USA and from Yukon, Northwest Territories and Québec in Canada (references in Marshall et al. 1987). The specimens from Québec, identified as part of a study on arthropods associated with Polyporus betulinus and Fomes fomentarius are considered members of O. flagellata sp. nov. (see above). The record from Yukon represents a different, and undescribed, species of Oribatella. I have not been able to confirm records from Alaska, Virginia and Northwest Territories. The record from Alberta (Walter et al. 2010), will be re-examined as part my study on Oribatella species of western North America.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFA3FFEFFF2BFD44FD667DD3.taxon	distribution	Distribution and Ecology. Oribata quadricornuta has a Holarctic distribution, as indicated by records cited by Marshall et al. (1987), and later by Kahwash et al. (1990), Weigmann (2006), Arroyo and Bolger (2007), Borges (2008), Shtanchaeva and Subías (2009), Siepel et al. (2009) and Moraza (2009). This is the most thoroughly studied species of Oribatella, with publications on the following aspects since those referenced by Marshall et al. (1987): the structure of the lenticulus (Alberti & Fernandez 1990), the sequence of, the D 3 domain of the 28 S rRNA gene and its flanking regions (Maraun et al. 2003), feeding preferences (Schneider & Maraun 2005), soil recolonization (Domes et al. 2006), as vectors for soil microfungi (Renker et al. 2005), as intermediate hosts of tapeworms (Denegri 1993), and presence in metal contaminated sites in Europe (Khalil et al. 2009). In addition to typical substrates (litter, moss) it has been found associated with the feathers of the tree sparrow (Krivolutsky & Lebedeva 2004).	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFA2FFE3FF2BFD85FD5D7875.taxon	description	(Figs. 20 – 22)	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFA2FFE3FF2BFD85FD5D7875.taxon	materials_examined	Material examined: As Oribatella 4 - dentata, Holotype female (MCZ 92784), USA: New York, Sea Cliff (MCZ). Other material examined: USA: D. C. Washington, 4. ix. 1964 (W. S. Suter) 5 from forest floor litter, FM (HD) 64 – 58 (RNC); North Carolina, Wake Co., Umstead State Park, 10. iii. 1963 (Metz and Farrier) from hardwood litter (RNC); Buncombe Co., Bent Creek Experimental Forest, v. 1974, 2 from oak / pine forest litter (RNC); Virginia, Chandler’s Mill Pond, 14. vii. 1973 (M. Delfinado and E. W. Baker) 1 (RNC); Mississippi: Grenada Co., T 21, 29. v. 1991 (G. T. Baker) 1; Louisiana: Cameron Co., Hackberry Prairie, 29 º 58 ’ 26 ” N 93 º 25 ’ 43 ” W, 21. ii. 1993 (VBP) 2 from wild rose and shrubby tree on small rise; Cameron Prairie, 29 º 56 ’ 45 ” N 93 º 05 ’ 20 ” W, 23. ii. 1993 (VBP) 1 from litter of wax myrtle and herbaceous plants; Georgia, Clarke Co., Athens, Simonton Bridge Rd., Botanical Gardens, 1982 (D. Mallow) 2 from mixed litter (RNC).	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFA2FFE3FF2BFD85FD5D7875.taxon	diagnosis	Diagnosis. Total length 600 – 711 µm; length holotype female 663 µm (given as 600 µm in Banks (1895); length holotype of O. magniseta given as 711 µm by Woolley (1958 )). Integument of notogaster, ventral and anal plates and coxisternal region microtuberculate. Integument of prodorsum, tutorium and gnathosomal mentum micropunctate. Integument of pteromorph micropunctate and strongly reticulate (Fig. 20 B). Coxisternum with reticulate striae laterally. Rostrum strongly triangular, rostral margin flattened medially, with pair of distinct lateral dens. Rostral seta strongly directed medially, about 172 – 206 µm long, with long barbs. Lamella with short striae laterally. Lamella (including cusp) about 253 µm long, lamellar cusps about 199 µm long, 89 µm at width of seta le; medial dens 108 – 120 µm long, longer than lateral dens 88 – 106 µm; medial and lateral dens usually without teeth, latter occasionally with 1 tooth on lateral margin. Lamellar cusps contiguous anteromedially, occasionally diverging; separated posteromedially, leaving prodorsum visible through narrow oval opening, about 2 µm wide, 4 – 20 µm long. Lamellar setae about 200 µm long, thick, heavily barbed, tapered, arising anteroventrally, positioned medially on cusp. Interlamellar setae about 240 – 288 µm long; less thick than seta le, equally barbed, tapered. Mutual distance of setae in about 104 – 108 µm. Bothridial setae about 144 µm long, barbed, narrow, blunt distally, subequal in shape to le. Exobothridial seta absent, reduced to alveolar vestige. Genal tooth narrow, elongated, subrectangular, with long dens ventrodistally, with longitudinal ridge ventrally. Tutorium reticulate, flat, blade-like, about 240 µm long, of which cusp about 122 µm long, with 6 - 8 dens distally. Porose area Al with distinct border, developed as broad inverted sac, about 12 µm in diameter. Ah developed as large sac, Am as porose area. Epimeral setae long, finely barbed, acuminate, 1 a, 2 a about 36 µm long, 1 b about 60 µm, 3 b, 3 c subequal in shape to other setae, about 100 µm long, 4 c thickest seta, acuminate about 100 µm long. Custodium absent. Genital setae in longitudinal line medially on plate, 1 + 5, only g 1 on anterior margin of plate; setae thin, barbed, about 24 – 29 µm long. Lyrifissure iad parallel to and anterior of anterolateral margin of anal plate. Anal setae about 14 µm. Adanal setae thick barbed, 40 – 60 µm. Postanal porose area about 19 x 6 µm. Notogastral length subequal to width (flattened in Fig. 20 A). Anterior margin undulating, with small projection lateral of bothridium, with about 11 transverse ridges (Fig. 20 A). Pteromorph with small dens at anteroventral margin (Fig. 20 B). Four pairs of porose areas, Aa about 12 µm in diameter. Eleven pairs of roughened notogastral setae present, about 192 – 240 µm long; c 2 and c 3 longest; c 3 positioned laterally on pteromorph (Fig. 20 B); lm medial of Aa, lp medial of A 1; mutual distance of pair h 1 – h 1 about 101 µm, wider than distance p 1 – p 1, about 82 µm. Gnathosoma elongate, chelicera elongate, narrowly chelate-dentate (Fig. 20 D, 21 C). Subcapitulum strongly tapered, triangular (Fig. 21 A). Rutella with reduced sclerotization. Mentum without transverse carina or tectum; setae a, m and h, acuminate, about 40, 44, and 24 µm long respectively (Fig. 21 A). Axillary saccule 9 x 2 µm, at base of palp (Fig. 21 A arrow). Palptarsal setation 0 - 2 - 1 - 3 - 8 (1) with solenidion ω recumbent and 2.5 x length acm; acm associated with distal cluster of eupathidia and touching solenidion ω along distal half its length (Figs. 20 E, 21 B, D). Leg setation (I to IV): trochanters, 1 - 1 - 1 - 1; femora, 5 - 5 - 2 - 2; genua, 3 (1) - 3 (1) - 1 (1) - 2; tibiae 4 (2) - 4 (1) - 3 (1) - 3 (1); tarsi, 20 (2) - 15 (2) - 15 - 12 (Fig. 22). Setae l ” of genu I about 65 µm; seta l’ absent from trochanter III and femur III. Spines absent anterodorsally on tibia I. Tarsi heterotridactylous.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFA2FFE3FF2BFD85FD5D7875.taxon	discussion	Remarks. Oribatella quadridentata is the type species of the genus, and is the most unusual among species known from eastern North America (see above under Remarks on the genus). Adults have a number of character states unusual for species in the genus. (1) Notogastral seta c 3 is present, giving a notogastral setation of 11 pairs. (2) Humerosejugal porose area Ah is developed as a thin-walled sac or pouch; it is similar in structure to Ah of the achipteriid Achipteria nitens (Nicolet), as Grandjean (1962) discussed and illustrated, except that the latter is everted as a vesicle. Alberti et al. (1997) illustrated the porose structure of the thin wall of the similar Ah of A. coleoptrata (L.) with scanning microscopy and it has the same appearance as that of O. quadridentata. (3) The custodium is absent. (4) Only seta v’ is developed on trochanter III; seta l’ is absent. (5) The components of the gnathosoma are elongated, including subcapitulum, chelicerae and rutella. (6) The palptarsal setation is 0 - 2 - 1 - 3 - 8 (1) with solenidion ω recumbent and acm is associated with a distal cluster of eupathidia and touching solenidion ω only along a small part of its length. This expression of solenidion ω and eupathidium acm is almost identical to that illustrated for the oripodoid Stelechobates megalotrichus Grandjean (Grandjean 1965, his Fig. 4 A). As these character states have either not been described, or are poorly described in most descriptions of known Oribatella, it is presently impossible to evaluate their uniqueness in O. quadridentata. This species was partially redescribed by Woolley (1958), under its synonym O. magniseta.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFA2FFE3FF2BFD85FD5D7875.taxon	distribution	Distribution and Ecology. Oribatella quadricornuta is widely distributed throughout eastern USA, from New York to Louisiana (see Marshall et al. 1987) (Table 1).	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFAEFFE4FF2BFB67FD137E5A.taxon	description	Materal examined. Topotype female, compared with type by R. A. Norton, 19. viii. 1988 (RNC), USA, Missouri, Boone Co., Hinkson Creek, Columbia, S. U. Mo. Campus, 24. iv. 1985 FMHD # 85 – 115 (J. Kethley, R. A. Norton) from moss on base of tree (RNC); Illinois, Union Co., Shawnee National Forest, 37 ° 504 N 89 ° 372 W, 23. ix. 1992 (VBP) 1 from litter from under large felled tree; same data except 1 from decomposing fallen oak.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFAEFFE4FF2BFB67FD137E5A.taxon	diagnosis	Diagnosis. Length topotype female 360 µm; notogastral length 240 µm. Mean total length about 360 µm. Integument of notogaster, pedotectum I, lamellae, ventral and anal plates and coxisternal region reticulate, with integument micropunctate within reticules (Fig. 23 A – C). Rostrum rounded medially. Lamella (including cusp) about 137 µm long, lamellar cusps about 84 µm long, 48 µm at greatest width; medial and lateral dens subequal, about 58 µm; medial dens without teeth; lateral dens with 3 – 4 teeth, varying among specimens and on either side of same specimen. Maximum distance between lamellae 12 µm. Setae ro about 78 µm long, strongly barbed along length, acuminate, strongly directly medially. Setae le about 80 µm long, thick, heavily barbed, tapered. Setae in about 140 µm long, thick (less so than le), heavily barbed, tapered; mutual distance of pair 48 µm. Bothridial setae about 77 µm long, barbed, bacilliform, rounded distally. Exobothridial setae thin, smooth, about 29 µm. Genal tooth broad, subrectangular, rounded distally, with dens ventrodistally, with longitudinal ridge ventrally. Tutorium about 127 µm long, of which cusp about 70 µm long, rectangular, distal margin with 5 to 7 dens. Porose area Al about 10 µm in diameter. Epimeral setae 22 µm long, weakly barbed, 3 c and 4 c about 35 µm long, thicker and more heavily barbed than other epimeral setae. Custodium about 16 µm long, tapered. Genital setae 2 + 4, 2 pairs of genital setae on anterior margin of genital plates. Notogastral length subequal to width. Anterior margin undulating, convex lateral of bothridium, with about 7 transverse ridges. Pteromorph with reticulate pattern and with ridges along anterior margin (Fig. 23 B); with or without small dens on anteroventral margin. Porose areas small about 10 µm diameter. Ten pairs of long barbed, tapered notogastral setae present, 62 – 90 µm long, with c longest, closely following curved contour of notogaster laterally; lm posteromedial of Aa, lp anterior to A 1. U-shaped lenticulus present. Mentum with transverse carina anteriorly. Seta l ” of genu I and II about 34 µm long. Tarsi heterotridactylous.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFAEFFE4FF2BFB67FD137E5A.taxon	discussion	Remarks. Oribatella reticulata may have been confused in the literature. Shtanchaeva and Subías (2009) noted that this “ species differs from all other species of the genus by the polygonal sculpture of the notogaster ”. However, the widely distributed O. minuta also has polygonal (reticulate) sculpture on the notogaster. The two species differ by the following character states (those of minuta in parentheses): Reticulate integument of pedotectum I similar to that of notogaster (with dense small foveae, without distinct reticulation of notogaster). Notogastral seta c about 80 – 90 µm long, strongly barbed, strongly following curvature of body (c about 50 – 65 µm long, weakly barbed, directed laterally); seta lm posteromedial of Aa (seta lm medial of Aa).	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFAEFFE4FF2BFB67FD137E5A.taxon	distribution	Distribution and Ecology. In North America this species is known only from the type locality in Missouri and from Illinois. In the Palaearctic it has been recorded from the Caucasus (Shtanchaeva & Subías 2009), Russia, Poland, and Germany (see Marshall et al. 1987).	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFA9FFE6FF2BFD12FEE77E7A.taxon	materials_examined	Material examined. Paratype male, U. S. A., Alaska, AIP Lab. In 83 Gen. hosp. (?) 6. viii. 1948 (Sailer). This specimen was identified by M. Hammer and formed part of her study on Alaskan Oribatida (Hammer 1955); it was remounted from a dried Hoyer’s slide by R. A. Norton, 16. xii. 1983 and presently is in the RNC. Also: Canada, Ontario, Black Sturgeon Lake, 49 ° 19 ’ N 88 ° 49.5 W, 25. viii. 1972 (EEL) 1 from burrow litter under cedar tree base; New Brunswick, Kouchibouguac National Park, Kelly’s Beach, 3. viii. 1977 (EEL) 2 from litter in Myrica thicket on sand dune; same data except, 27 – 29. ix. 1977 (IMS) 2 from decaying wood and litter in fir stump.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFA9FFE6FF2BFD12FEE77E7A.taxon	diagnosis	Diagnosis Total length of adult 330 – 340 µm. Notogastral width about 240 µm. Integument of prodorsum, notogaster, pteromorph, venter and mentum microtuberculate. Integument of coxisternum with faint striae. Rostrum flattened, undulating, with or without minute lateral teeth. Lamella (including cusp) about 112 µm long, cusp about 80 µm long, about 48 µm wide at level of insertion of lamellar seta. Lamellar cusps diverging anteromedially; separated posteromedially, leaving prodorsum visible through oval opening, 24 µm long x 16 µm wide. Medial dens 40 – 45 µm, subequal to lateral dens; medial dens without teeth; lateral dens with 2 – 3 teeth laterally, with 0 – 2 small teeth medially (Fig. 23 D). Number of teeth on medial and lateral margin of lateral dens varying among specimens and on either side of same specimen. Long striae extending longitudinally along outer margin of lamella and cusp, fine striae medially (Fig. 23 D). Translamella without tooth, about 13 µm at greatest width and about 8 µm deep (Fig. 23 D). Setae ro about 56 µm long, strongly barbed along length, acuminate, strongly directly medially. Setae le about 72 µm long, thick, heavily barbed, tapered. Setae in about 133 µm long, thick (less so than le), heavily barbed, tapered; mutual distance of pair about 45 µm. Bothridial setae about 102 µm long, fusiform; head directed slightly anteromedially (Fig. 23 D). Exobothridial setae about 16 µm long, thin, weakly barbed. Genal tooth broad, rounded subrectangular, with dens ventrodistally, with longitudinal ridge ventrally. Tutorium about 115 – 123 µm long, of which cusp about 60 – 66 µm long, rectangular, distal margin with 5 – 7 dens. Pedotectum with striae; striae forming or not reticulations basally, reticulations about 2 – 3 µm at widest diameter. Custodium about 21 µm long, tapered. Porose area Al about 8 µm in diameter. Notogaster length subequal to width. Anterior margin undulating, convex lateral of bothridium, with about 10 transverse ridges. Pteromorph with small dens on anteroventral margin. Porose areas present, small, diffuse, about 5 – 8 µm in diameter, with Aa largest. Ten pairs of thin, smooth notogastral setae present; c about 29 µm long, l and h series about 25 µm long, p series about 19 µm long; setae positioned laterally so that lm posterior of Aa, and lp anterior of A 1. Distance h 1 – h 1 about 26 µm, subequal to distance p 1 – p 1, about 25 µm. Lenticulus present, broadly V shaped. Epimeral setae about 23 µm long, barbed, 3 c and 4 c about 30 µm long; 4 c longer thicker and more heavily barbed than other epimeral setae. Genital setae 2 + 4, 2 pairs of setae on anterior of genital plates; genital setae about 23 µm long, aggenital, anal and adanal setae barbed, about 16 – 23 µm long. Postanal porose area oval about 32 µm wide. Mentum without tectum covering base of gena, without transverse carina anteriorly. Axillary saccule about 4 x 2 µm. Leg setation (I to IV): trochanters, 1 - 1 - 2 - 1; femora, 5 - 5 - 3 - 2; genua, 2 (1) - 2 (1) - 1 (1) - 2; tibiae 4 (2) - 4 (1) - 3 (1) - 3 (1); tarsi, 20 (2) - 15 (2) - 15 - 12. Seta l " genu I about 26 µm, l " genu II about 38 µm. Tarsi heterotridactylous.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFA9FFE6FF2BFD12FEE77E7A.taxon	discussion	Remarks. Hammer (1955) noted a faint reticulation on the integument of this species, which is not evident in the paratype male, or other specimens examined. This species usually has been recognized in the literature as O. reticuloides Hammer, 1955, which is a lapsus.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFA9FFE6FF2BFD12FEE77E7A.taxon	distribution	Distribution. Oribatella reticulatoides is known from Alaska to New Brunswick and is a boreal / subarctic species. It is recorded from Québec, from the Russian Far East (Marshall et al. 1987), and possibly from Alberta (Walter et al. 2010).	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFABFFF9FF2BFD6EFE9F7F7C.taxon	description	(Figs. 23 E, 24, 25)	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFABFFF9FF2BFD6EFE9F7F7C.taxon	materials_examined	Material examined. Holotype: adult female. USA: Texas, Kendall Co., Guadeloupe State Park, 29 ’ 52.443 N 98 ’ 29.139 W, 3. iii. 2007 (VBP) from palmetto and oak litter; deposited in the CNC, type number 23958. Paratypes: same data as holotype, 2 males; Texas, Bandera Co., Lost Maples State Natural Area, 29 ’ 48.984 N 99 ’ 34.599 W, 28. ii. 2007 (VBP) 1 female from wash of oak twigs; Uvalde Co., Garner State Park, 29 ° 34.090 N 99 ° 44.876, 2. iii. 2007 (VBP) 1 female, 1 male from mesic deep oak and cedar litter in depression; deposited in the CNC and RNC.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFABFFF9FF2BFD6EFE9F7F7C.taxon	diagnosis	Diagnosis. Total length of adult 298 – 326 µm. Integument of notogaster, ventral and anal plates and coxisternal region micropunctate. Lamella (including cusp) about 108 µm long, cusp about 77 µm long, about 36 µm wide at level of insertion of seta le. Lamellar cusps fused posteromedially along length of about 24 µm, leaving prodorsum only visible through small oval opening, about 10 µm wide; translamella without tooth, about 10 µm at greatest width, 24 µm deep. Medial dens on lamellar cusp about 31 µm long, without teeth; lateral dens about 41 µm long with 3 – 4 teeth on lateral margin. Bothridial setae with barbed, narrowly fusiform head, rounded distally. Epimeral setae 3 c about 19 µm long, thickly barbed, and 4 c about 32 µm long, much thicker and more heavily barbed that other epimeral setae. Genital setae 1 + 5 or 2 + 4, 1 or 2 pairs of genital setae on anterior margin of genital plates. Ten pairs of long, curved, smooth to weakly barbed notogastral setae present; about 41 µm long, positioned so that lm posteromedial of Aa, and lp anterior of A 1. Tarsi heterotridactylous.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFABFFF9FF2BFD6EFE9F7F7C.taxon	description	Description. Adult. Dimensions: Mean total length: female (n = 2) 323 µm (320, 326); male (n = 4) 304 µm (range 298 – 322). Mean notogastral width: female (n = 2) 223 µm (220, 226); male (n = 3) 209 µm (range 206 – 216). Integument: Prodorsum, lateral of lamellae, notogaster, anal plate, pedotectum I with widely spaced micropuncta. Coxisternum, lamella, pedotectum I, tutorium and anterior of pteromorph with fine to very fine striae (Fig. 25). Mentum and genital plate microtuberculate. Prodorsum: Rostrum with medial crest dorsally; rostral margin undulating, with pair of minute dens laterally (Fig. 25). Lamella (including cusp) about 108 µm long, cusp about 77 µm long, about 36 µm wide at level of insertion of seta le. Lamellar cusps converging then diverging or parallel anteromedially; fused posteromedially, leaving prodorsum only visible through small oval opening, about 10 µm wide; translamella without tooth, about 10 µm at greatest width, about 24 µm deep (Figs. 23 E arrow, 24). Medial dens on cusp about 31 µm long, without teeth; lateral dens about 41 µm long with 3 – 4 teeth (Fig. 24), varying among specimens and on either side of same specimen. Setae ro about 53 µm long, strongly barbed along length, acuminate, curved anteromedially. Setae le about 58 µm long, thick, heavily barbed, tapered. Setae in about 103 µm long, thick (less so than le), heavily barbed, tapered; mutual distance of pair about 31 µm. Bothridial setae 72 – 77 µm long, with barbed, narrowly fusiform head, rounded to tapered distally, stalk short, smooth; head directed slightly anterodorsally (Figs. 23 E, 24). Exobothridial setae about 19 µm long, thin, barbed tapered. Lateral aspect of podosoma: Genal tooth broad, subrectangular, with dens ventrodistally, with longitudinal ridge ventrally. Tutorium about 108 µm long, of which cusp about 50 µm long, rectangular, distal margin with 3 – 5 dens. Custodium about 29 µm long (Fig. 25). Porose area Al about 10 µm in diameter. Notogaster: Length subequal to width. Anterior margin undulating, convex lateral of bothridium, with 5 – 7 transverse ridges (Fig. 24). Pteromorph with short ridges at anterior margin forming reticulate pattern; with small dens on anteroventral margin. Octotaxic system in form of 4 relatively small porose areas, about 8 µm in diameter. Ten pairs of long, curved, smooth to weakly barbed notogastral setae present; about 41 µm long, lm posteromedial of Aa, and lp anterior of A 1 (Fig. 24). Distance setae h 1 – h 1 subequal to distance p 1 – p 1, 14 – 16 µm. Subtriangular lenticulus present (not illustrated). Ventral region: Epimeral setae 1 a, 1 b, 1 c, 2 a, 3 a, 3 b about 8 – 10 µm long, weakly barbed; 4 a, 4 b about 13 µm long, weakly barbed; 3 c about 19 µm long, thickly barbed; 4 c about 32 µm long, much thicker and more heavily barbed than other epimeral setae (Fig. 25). Genital, aggenital, anal and adanal setae weakly barbed, about 8 – 10 µm long. Genital setae positioned in curved row, 1 or 2 pairs on anterior margin of plates. Postanal porose area oval, 12 x 6 µm. Gnathosoma: Mentum with transverse carina anteriorly. Axillary saccule about 5 x 2 µm. Legs: Setation (I to IV): trochanters, 1 - 1 - 2 - 1; femora, 5 - 5 - 3 - 2; genua, 3 (1) - 3 (1) - 1 (1) - 2; tibiae 4 (2) - 4 (1) - 3 (1) - 3 (1); tarsi, 20 (2) - 15 (2) - 15 - 12. Seta l ” of genu I about 32 µm, l ” of genu II about 29 µm. Tarsi heterotridactylous.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFABFFF9FF2BFD6EFE9F7F7C.taxon	etymology	Etymology. The specific epithet ‘ texana’ refers to the provenance of this species, Texas, USA.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFABFFF9FF2BFD6EFE9F7F7C.taxon	discussion	Remarks. This species is similar to O. pusilla, but differs from the latter in depth of the translamella about 24 µm (15 µm deep in pusilla), and epimeral seta 4 c being thick and barbed (subequal in shape, but more distinctly barbed in pusilla).	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFABFFF9FF2BFD6EFE9F7F7C.taxon	distribution	Distribution and Ecology. This species is known only from thick deciduous and coniferous litter from various parts of Texas.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFB4FFFBFF2BFC68FD527879.taxon	description	(Figs. 23 F, 26)	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFB4FFFBFF2BFC68FD527879.taxon	materials_examined	Material examined. Holotype: adult male. Canada, Cape Breton Highlands National Park, Aspy Trail, 28. viii. 1984 (VBP) from lichens and moss on trunks of maple about 2 m above ground; deposited in the CNC, type number 23959. Paratypes: 1 male, 1 female; Ontario, Leeds-Grenville Co., near Otter Lake, 44 ° 34.87 N 76 ° 19.77 W, 22. vii. 2003 (VBP, J. Chen, J. Johnson) from moss with lichen on W-facing limestone slope; Newfoundland, Pasadena, 28. vii. 1976 (EEL) 1 male, 1 female from moss on rotting log; New Brunswick, Kouchibouguac National Park, 21. ix. 1977 1 male from mushrooms and leaf litter; Ontario, Leeds-Grenville Co., Chaffey’s Locks 30. v. 1974 (IMS) 1 female from moss on rocks near spring. Paratypes deposited in the CNC and RNC.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFB4FFFBFF2BFC68FD527879.taxon	diagnosis	Diagnosis. Total length of adult 450 – 452 µm. Prodorsum, notogaster, anal plate, pedotectum I with widely spaced micropuncta. Ventral plate with shallow foveae. Genital plate micropunctate with strong striae. Lamella with distinct transverse striae. Lamella (including cusp) about 175 µm long, cusp about 148 µm long, about 60 µm wide at level of insertion of seta le. Translamella without tooth. Medial dens on lamellar cusp, thickened, narrow, slightly concave laterally, about 80 µm long, without teeth; lateral dens shorter, about 65 µm long, 2 - 3 times width of medial dens, with 8 – 10 teeth. Bothridial setae with barbed, fusiform head, tapered distally. Epimeral seta 3 c longest and thickest, about 49 µm long; 4 c weakly barbed, about 17 µm long. Genital setae 2 + 4, 2 pairs of genital setae on anterior margin of genital plates. Ten pairs of long, curved, weakly barbed notogastral setae about 63 µm long, lm posterior of Aa, and lp anterior of A 1. Tarsi heterotridactylous.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFB4FFFBFF2BFC68FD527879.taxon	description	Description. Adult. Dimensions: Mean total length: female (n = 1) 450 µm; male (n = 2) 451 µm (450, 452). Mean notogastral width: female (n = 1) 295 µm; male (n = 2) 295 µm (290, 300). Integument: Prodorsum, lateral of lamellae, notogaster, anal plate, pedotectum I with widely spaced micropuncta. Ventral plate with shallow foveae. Coxisternum, lamella, pedotectum I, anterior of pteromorph with striae and micropuncta. Lamella with distinct transverse striae (Figs. 23 F, 26). Genital plate micropunctate with strong striae. Prodorsum: Rostrum with distinct medial crest dorsally; rostral margin slightly undulating, with pair of minute dens laterally. Lamella (including cusp) about 175 µm long, cusp about 148 µm long, about 60 µm wide at level of insertion of seta le. Lamellar cusps parallel or diverging anteromedially; prodorsum visible through oval opening, about 15 µm wide, 37 µm long; translamella without tooth, about 15 µm at greatest width (Fig. 23 F). Medial dens on lamellar cusp, narrow, thickened, slightly convex laterally, about 80 µm long, without teeth; lateral dens shorter, 2 – 3 times width medial dens, about 65 µm long with 8 – 10 teeth on lateral margin (Fig. 26), varying among specimens and on either side of same specimen. Setae ro 108 – 125 µm long, strongly barbed along length, acuminate, curved anteromedially. Setae le 130 – 133 µm long, thick, heavily barbed, tapered. Setae in 168 – 175 µm long, thick (less so than le), heavily barbed, parallel; mutual distance of pair about 80 µm. Bothridial setae 120 – 130 µm long, with barbed, narrowly fusiform head, tapered distally, stalk long, smooth; head directed slightly anterodorsally (Figs. 23 F, 26). Exobothridial setae about 19 µm long, thin, barbed tapered. Lateral aspect of podosoma: Genal tooth broad, subrectangular, with dens ventrodistally, with longitudinal ridge ventrally. Tutorium extending anterior of rostrum, about 200 µm long, of which cusp about 130 µm long, rectangular, slightly convex ventrally, distal margin with about 7 dens. Custodium 32 – 35 µm long, tapered. Porose area Al about 10 µm in diameter. Notogaster: Length subequal to width. Anterior margin undulating, convex lateral of bothridium, with 5 – 7 transverse ridges. Pteromorph with short ridges at anterior margin; with small dens on anteroventral margin. Octotaxic system in form of 4 pairs of relatively small porose areas. Ten pairs of long, curved, smooth to weakly barbed notogastral setae present; about 63 µm long, lm posterial of Aa, and lp anterior of A 1 (Fig. 26). Distance setae h 1 – h 1 about 35 µm, greater than distance p 1 – p 1, about 25 µm. Lenticulus U-shaped. Ventral region: Epimeral setae 10 – 50 µm long, barbed; 3 c longest and thickest, about 49 µm long; 4 c weakly barbed, about 17 µm long. Genital, aggenital, anal and adanal setae weakly barbed, about 8 – 10 µm long. Genital setae arranged in curve, 2 + 4, 2 pairs of setae on anterior margin of plates. Postanal porose area oval, 12 x 10 µm. Gnathosoma: Mentum with transverse carina anteriorly, reflexed, without tectum. Axillary saccule about 5 x 2 µm. Legs. Setation (I to IV): trochanters, 1 - 1 - 2 - 1; femora, 5 - 5 - 3 - 2; genua, 3 (1) - 3 (1) - 1 (1) - 2; tibiae 4 (2) - 4 (1) - 3 (1) - 3 (1); tarsi, 20 (2) - 15 (2) - 15 - 12. Seta l ” of genua I and II about 24 µm. Tarsi heterotridactylous.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFB4FFFBFF2BFC68FD527879.taxon	etymology	Etymology. The specific epithet, transtriata, refers to the transverse striae on the lamellae.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFB4FFFBFF2BFC68FD527879.taxon	discussion	Remarks. This species is easily distinguished from other eastern North American species of Oribatella by the transverse striae on the lamellae and by the very narrow medial dens of the lamellar cusp, which is distinctly longer than the lateral dens.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
AF4287B1FFB4FFFBFF2BFC68FD527879.taxon	distribution	Distribution and Ecology. Oribatella transtriata is known from boreal habitats in eastern Canada, but it probably has a wider boreal distribution in North America.	en	Behan-Pelletier, V. M. (2011): Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa 2973 (1): 1-56, DOI: 10.11646/zootaxa.2973.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2973.1.1
