taxonID	type	description	language	source
CB634285557DA7E0B13018EF0865785D.taxon	discussion	Introduction The genus Atropacarus (type, Hoplophora stricula C. L. Koch) was proposed by Ewing (1917) for monodactyl ' Hoplodermatinae' (= Euptyctima) with a sculptured integument but without a median aspal carina. Jacot later (1930) submerged the genus in Steganacarus, giving it subgeneric ranking with Tropacarus, while Grandjean (1934) regarded the presence of an additional pair of setae in the posterolateral region of the notogaster as sufficient reason for retaining Atropacarus as a separate genus. Although Atropacarus has remained monotypic, Sheals (1969), in the course of a numerical taxonomic study of certain Phthiracaroidea, recognized three further species which he considered might be classified in this genus. These were Steganacarus diaphanum Jacot and two undescribed Steganacarus species from Italy and Nepal; the latter is here regarded as a ' variant' of S. striculus and the former as Steganacarus clavigerus (Berlese). Together with striculus, these species formed a distinct component within Steganacarus in being relatively small (notogastral length 300 - 475 ym), possessing at least 16 pairs of notogastral setae and having a coupled solenidion on tibia IV (this solenidion is free throughout the rest of the genus). However, while size is usually given in modern descriptions, there is little information available on the chaetotactic pattern of the legs and notogaster, but it would seem that the combination of characters exhibited by the above species may be present in further described species of Steganacarus. Accordingly, a search was undertaken of all the available Steganacarus material which superficially resembled striculus - the results of a preliminary survey indicated that the genus Atropacarus * should be retained. * Since this manuscript went to press a paper has been published by Aoki (25 March. 1980. Bull. Inst. Sci. Technol, Yokohama 6 (2): 1 - 88.) in which he separates Atropacarus from Steganacarus to include the species A. phyllophorus. A. serratus and A. striculus. Therefore, in the present paper Atropacarus phyllophorus is not a new combination.	en	Kamill, B. W., Baker, A. S. (1980): The genus Atropacarus Ewing (Acari: Cryptostigmata). Bulletin of the British Museum of Natural History (Zoology series) 39: 189-204, URL: http://unknown
CB634285557DA7E0B13018EF0865785D.taxon	diagnosis	Definition: Moderately sclerotized, rather elongate Phthiracaridae ranging in length from about 300 - 500 ym (lateral measurement of notogaster taken from the anterodorsal limit of the collar to a point just ventral to seta h 1). The integument of the dorsal and ventral shields is usually strongly ornamented while that of the infracapitulum, chelicerae and appendages is densely punctate. The interlamellar and lamellar setae are short and procumbent and the aspis bears a median keel. Sensillus cranked near the base. The notogaster bears at least 16 pairs of setae. A notogastral cowl may be present or absent. Fissures ip and ips are absent. Four pairs of anal setae are located on the paraxial margins of the anal plates and a Single pair of adanals submarginally. There are at least seven pairs of genital setae along the paraxial margins of the genital plates. On tarsus I the posterior anterolateral seta is reduced and inserted adjacent to, or distally, in relation to the posterior fastigial seta. On leg IV the tibial solenidion is coupled. Diagnosis: Atropacarus can be distinguished as a phthiracarid genus with the following combination of characters: 1 Notogaster with 16 or more pairs of setae. 2 Posterior anterolateral seta on tarsus I reduced. 3 Solenidion on tibia IV coupled with a reduced dorsal seta.	en	Kamill, B. W., Baker, A. S. (1980): The genus Atropacarus Ewing (Acari: Cryptostigmata). Bulletin of the British Museum of Natural History (Zoology series) 39: 189-204, URL: http://unknown
A13342C58362FB1065D3231DD9BC30F9.taxon	description	(Figs 1 - 12; 27 - 32)	en	Kamill, B. W., Baker, A. S. (1980): The genus Atropacarus Ewing (Acari: Cryptostigmata). Bulletin of the British Museum of Natural History (Zoology series) 39: 189-204, URL: http://unknown
A13342C58362FB1065D3231DD9BC30F9.taxon	description	Aspis (Figs 1 - 2; 28): 180 - 230 um long and with a greatest width of 141 - 163 ym. All the dorsal setae are moderately short, procumbent and serrated distally. The lamellar (la) and interlamellar setae (il) are located at the level of the bothridia. Setae (il) are at least twice the length of setae (la) and extend about one-third of the distance between the bases of setae (il) and (ro). The sensillus, 86 - 114 ym in length (but see striculus insularis below), is slender smooth and cranked near the base (Fig. 28); distally the sensillus is serrated and tapers to fine point. Three finger-like tracheoles are associated with each bothridium and there is Single pairof short exobothridial setae (ex). There is a rather low, broad, median keel in front ofthe il-la setae while posteriorly the integument is raised into a number of longitudinal ridges. The prodorsal integument is opalescent and distinctly pitted. Notogaster (Figs 4 - 5; 27; 29 - 30): 375 - 475 ym in length and with a greatest depth of 225 - 300 ym. The notogaster carries 16 pairs of setae, all of which are stout, erect, serrated distally (Fig. 30) and shorter than the distance c 1 - d 1 Setae c 1 and c 3 are inserted close to the posterior margin of the collar and seta c 2 submarginally. In comparison with species oft the genus Steganacarus, A. striculus has an additional pair of setae in the posterior region of the notogaster between setae h 1 and ps 1 The vestiges of setae f 1 and f 2 are present, f 1 being located just posterior to seta h 1, and f 2 between e 2 and h 2. The fissures ip and ips are absent. The integument is opalescent and generally distinctly pitted (Fig. 29). Ano-genital region (Figs 3; 27): On each anal plate there are four pairs of marginal anal setae (an 1 - 4) and a single pair of adanals (ad) located submarginally and rather far forward. Setae an 1 _ 4 are more or less equal in length and about twice as long as the adanal setae. Ventrally, each anal plate has a prominent anteromedian lobe, the left overlying the right (' right-fitting' arrangement, see van der Hammen, 1963). There are usually seven pairs of genital setae (g 1 _ 7) arranged in a pattern 4 + 3 along the paraxial margins of the genital plate setae g 1 _ 4 being approximately half the length of setae g 5 _ 7. A single aggenital seta ag located antiaxially in the genital furrow. The integument of the ano-genital region distinctly pitted with the exception of the setae-bearing areas which have no ornamentation. There are three pairs of genital papillae (g. p. 1 _ 3), the anterior pair (g. p. 1) being rather small. Infracapitulum: Typically phthiracaroid in form (see, for example, Parry, 1979). There are three pairs of adoral setae, the anterior pair being brush-like distally and the posterior two pairs weakly serrated. Pedipalps (Fig. 8): Three-segmented with the setal formula (2 - 2 - 7). Four of the tarsal setae (acm, ul', ul " and sul) are eupathidial, sul being the shortest. Chelicerae (Figs 6 - 7): The movable digit has three distinct teeth and the fixed digit carries five. The latter are arranged in two rows, an inner one of three teeth and an outer one of two. The principal segment carries about six conical spines on the antiaxial surface and about 12 sharply pointed spines paraxially. Setae cha and chb are both serrated, cha being somewhat longer than chb. Legs (Figs 9 - 12; 31 - 32): The solenidial formulae for the legs are I (2 - 1 - 3); II (1 - 1 - 2); III (0 - 1 - 1) and IV (0 - 1 - 0). All the solenidia are rather long, usually with a single coil distally. Solenidion omega 2 on tarsus I is coupled with a small distal seta (Fig. 31). The latter was first observed in S. striculus by Griffiths and Sheals (1971) who described the seta as being sabre shaped. On all legs the tibial solenidion phi is coupled with a reduced dorsal seta (Fig. 32) while on genu I solenidion sigma 1, is coupled with a reduced posterolateral seta (l "). The formulas for the leg setae are I (1 - 4 - 2 - 5 - 16 - 1); II (1 - 3 - 2 - 3 - 12 - 1); III (2 - 2 - 1 - 2 - 10 - 1) and IV (2 - 1 - 1 - 2 - 10 - 1). On tarsus I six of the setae (s, (it), (p) and a') are eupathidial. The famulus is rugose and closely associated with omega 1. Seta a " is short (approximately half as long as the famulus), smooth and located on a level with the solenidion omega 1. Setae (tc) and (u) on tarsus I and (tc), (u), (p) and s on tarsi II to IV are ribbon-like, hooked distally and covered with whorls of spicules in the middle third. Seta d on femur I is rather short, hooked distally and apparently smooth, while the anteroventral seta v' on this segment is comparatively short and stout. On all segments the ventral setae (v) bear two or three rows of distinct serration while the lateral setae (l) carry only a few weakly-developed serrations. All the tarsi terminate in a single claw bearing two ventral teeth.	en	Kamill, B. W., Baker, A. S. (1980): The genus Atropacarus Ewing (Acari: Cryptostigmata). Bulletin of the British Museum of Natural History (Zoology series) 39: 189-204, URL: http://unknown
A13342C58362FB1065D3231DD9BC30F9.taxon	materials_examined	Material: Material was examined from the following unnamed and unsorted collections of the British Museum (Natural History): beech litter, Box Hill, Surrey, August, 1973 (K. H. Hyatt); beech litter, Chalfont St. Giles, Buckinghamshire, 8. xi. 64 (J. G. Sheals); hedgerow litter, Peterborough, Cambridge, 23. i. 78 (P. N. Lawrence & B. R. Pitkin); Sphagnum litter Hartland Moor, Dorset, 8. xi. 63 (P. N. & K. Lawrence); yew humus, Manor Wood Rothamsted Experimental Station, Hertfordshire, 22. viii. 61 (P. N. Lawrence); deciduous humus, Roudsea Woods, Grange-over-Sands, Lancashire, 24. ix. 62 (P. N. Lawrence); alder litter, Westwood Marshes, Suffolk, 8. iii. 64 (P. N. & K. Lawrence); mixed hawthorn and sallow litter, Woodwalton Fen, Huntingdonshire, 18. ix. 63 (P. N. & K. Lawrence); soil in cracked rock, Inchiquin Lough, Co. Clare, 9. vii. 60 (P. N. Lawrence); sycamore humus Newtown Castle, Co. Clare, 5. vii. 60 (P. N. Lawrence); rhododendron humus, Milke Danda East Nepal, 2. xii. 61 (J. G. Sheals); forest litter, Kronasen, Sweden, 23. V. 64 (P. N. Lawrence Material was also examined from: moss on branches of Juniperus brevifolia, Faial, Azores 19. vi. 69 (P. Ohm) (ITAZ, Berlin); moss, Donaustaufer Forest, Regensburg, West Germany 14. viii. 59 (M. Sellnick) (ZM, Hamburg) (one of these specimens, now dissected and mounted in Berlese's fluid, is hereby designated as the neotype); litter and humus under Fagus crenata, Kuromatsunai, Japan, 25. xi. 68 (T. Fujikawa) (NSM, Tokyo).	en	Kamill, B. W., Baker, A. S. (1980): The genus Atropacarus Ewing (Acari: Cryptostigmata). Bulletin of the British Museum of Natural History (Zoology series) 39: 189-204, URL: http://unknown
A13342C58362FB1065D3231DD9BC30F9.taxon	discussion	Remarks: Hoplophora stricula was described by Koch from marshy places near Regensburg West Germany. Although Koch's original specimens are presumed to be lost, his figures and description permit reidentification. Material collected at Regensburg by Dr Max Sellnick has been compared with specimen from the British Isles, Japan and Nepal. With the exception of the British material, the general form of the aspis and notogaster and their setal arrangements appear to be identical However, amongst the British population, a number of'variants' were observed in which femur I carried four setae and genu IV carried no setae. Moreover, the ' femur I- 4, genu IV- 0 ' condition (see also, Parry, 1979) was invariably associated with the presence of one or two additional pairs of setae on the genital plates (total 8 or 9 pairs respectively) while on the notogaster the setae were always rather short and weakly serrated. By contrast, the notogastral setae of the Nepalese specimens (see also, Sheals, 1965) were very much stout and more strongly serrated than those of the other populations. Again, amongst the British ' variants', the aspal carina was only weakly developed while the lamellar setae were considerably less than half the length of the interlamellars. The sensilli appear to be identical in all four populations. The single specimen of striculus insularis collected on the Azores has also been compared with the Regensburg material and the following differences noted: aspal crest somewhat lower than in typical A. striculus; lamellar setae considerably shorter than half the interlamellar length; sensilli about 65 um long and slightly thickened; notogastral setae relatively shorter and more slender than in typical A. striculus; notogastral integument punctate as in species of the genus Phthiracarus; nine pairs of genital setae (Weigmann figures only eight pairs) arranged in a pattern of 5 + 4 along the paraxial margins of the genital plates; genu IV- 0. Bearing in mind the degree of variation observed in the populations studied above, it seems inadvisable at the present time to warrant the single specimen from the Azores with subspecific ranking. Steganacarus spinosus, recorded by Sellnick (1920) from humus in the woods around Loetzen, West Germany, closely resembles A. striculus, and it seems likely that in the past the identities of these two species have been confused. Two specimens, determined by Sellnick from Patscherkofel, Nordtirol, Austria have been examined and although they have been found to fall within the size range given above for striculus (notogastral length 375 - 475 ym), the notogaster bears only 15 pairs of setae while the solenidion on tibia IV is free.	en	Kamill, B. W., Baker, A. S. (1980): The genus Atropacarus Ewing (Acari: Cryptostigmata). Bulletin of the British Museum of Natural History (Zoology series) 39: 189-204, URL: http://unknown
7543CCE07A8CCCDDBDEE9C435C1DCF65.taxon	description	(Figs 13 - 19)	en	Kamill, B. W., Baker, A. S. (1980): The genus Atropacarus Ewing (Acari: Cryptostigmata). Bulletin of the British Museum of Natural History (Zoology series) 39: 189-204, URL: http://unknown
7543CCE07A8CCCDDBDEE9C435C1DCF65.taxon	description	Aspis (Figs 16 - 17): 188 - 246 ym long and with a maximum width of 127 - 165 ym. All the dorsal setae are short, stout and distinctly feathered. Setae (il) and (la) are more or less equal in length and extend to the anterior limits of the bothridia. The sensilli, 77 - 96 ym in length, are expanded and serrated distally, while the basal portion is smooth, slender and distinctly cranked. In front of the il-la setae there is a prominent median keel and posteriorly the integument is raised into a number of longitudinal and transverse ridges. The ornamentation of the prodorsal integument (apparently always encrusted with detritus) is rather striking and may be described as raised reticulate. Notogaster (Figs 13 - 14): The notogaster ranges in length from 354 - 167 ym with a greatest depth of 188 - 283 ym. There are 20 pairs of setae, all of which are very short (less than c 1 - d 1), stout and bear three or four whorls of blunt serrations. In comparison with the notogastral chaetotaxy of striculus, A. clavigerus has four additional pairs of setae, one in the c series, another in the h series, and two pairs in the ps series. The vestiges of setae f 1 and f 2 are present, f 1 being localcd ventral to the seta h 1 and f 2 ventral to the seta e 2. The notogastral integument is ornamented in a raised reticulate pattern. Ano-genital region (Fig. 15): The four pairs of anal setae (an 1 - 4) are located marginally with a single pair of adanals (ad) (missing in speeimen figured) located submarginally and rather close to (an 4). All the anal setae are short. the anterior two pairs (an 3 - 4) being approximately twice as long as the posterior two. There are nine pairs of minute genital setae (g 1 - 9) arranged in a pattern of 6 + 3 along the paraxial margins of the genital plates. The ornamentation of the genital and anal plates is similar to that of the notogaster. Chelicerae: The chelicerae resemble those of A. striculus although the antiaxial and paraxial surfaces carry a smaller number of spines. Legs (Figs 18 - 19): The setal and solenidial formulae for the legs are as in A. striculus. All the solenidia are long and straight. On tarsus I the seta coupled with solenidion omega 2 is short with only a weakly developed distal process (see Parry, 1979). Seta a " is rather short (approximately half as long as the famulus) and closely associated with the long posterior fastigial seta ft ". Setae (tc) and (u) on tarsus I and (tc), (u), (p) and s on tarsi II to IV are ribbon-like, hooked distally and bear whorls of sharply pointed spicules in the middle third. On femur I seta d is short and somewhat thickened while seta v' on this segment is stout and strongly serrated.	en	Kamill, B. W., Baker, A. S. (1980): The genus Atropacarus Ewing (Acari: Cryptostigmata). Bulletin of the British Museum of Natural History (Zoology series) 39: 189-204, URL: http://unknown
7543CCE07A8CCCDDBDEE9C435C1DCF65.taxon	materials_examined	Material: Eight specimens. BMNH 1979.6.21.6 - 13, from oak litter (Quercus ilex), Boboli Gardens, Florence, Italy. The material was collected by Dr J. G. Sheals, 18 March 1971.	en	Kamill, B. W., Baker, A. S. (1980): The genus Atropacarus Ewing (Acari: Cryptostigmata). Bulletin of the British Museum of Natural History (Zoology series) 39: 189-204, URL: http://unknown
7543CCE07A8CCCDDBDEE9C435C1DCF65.taxon	discussion	Remarks: Berlese (1904) recorded clavigerus from dead leaves in the Boboli Gardens, Florence, but described the type of the species from Pisa. Unfortunately, we have not been able to examine the holotype but we have studied photographs of the latter taken by Dr J. G. Sheals (BMNH). The specimen appears to be in good condition and although undissected the integumental ornamentation and chaetotactic characters can be discerned. Material collected from the Boboli Gardens has been compared with photographs of the holotype - no morphological differences could be detected. A. clavigerus differs from the other members of the genus by having four additional pairs of setae on the notogaster. Moreover, the very striking ornamentation of the prodorsal and notogastral integument serves to characterize this species.	en	Kamill, B. W., Baker, A. S. (1980): The genus Atropacarus Ewing (Acari: Cryptostigmata). Bulletin of the British Museum of Natural History (Zoology series) 39: 189-204, URL: http://unknown
C9C49BCB6FA25A080AF16D60780A464D.taxon	description	(Figs 20 - 26)	en	Kamill, B. W., Baker, A. S. (1980): The genus Atropacarus Ewing (Acari: Cryptostigmata). Bulletin of the British Museum of Natural History (Zoology series) 39: 189-204, URL: http://unknown
C9C49BCB6FA25A080AF16D60780A464D.taxon	description	Aspis (Figs 23 - 24): 196 - 208 ym long and with a greatest width of 138 - 145 ym. All the dorsal setae are short, stout and brush-like distally. Setae (il) are about twice the length of setae (la) and together form a transverse row behind which the prodorsal integument is raised into a number of irregularly arranged longitudinal and transverse ridges. The sensillus is 97 - 111 ym in length and closely resembles that of A. striculus. In front of the il-la row there is a broad and rather pronounced median keel. The integument is sculptured in a reticulate pattern. Notogaster (Figs 20 - 21): 376 - 446 ym in length and with a greatest depth of 198 - 238 ym. The notogastral chaetotaxy closely resembles that of A. striculus. There are 16 pairs of setae all of which are rather short (less than c 1 - d 1), broadly spatulate, and serrated marginally. Setae c 1 - 3 form a row submarginally on the cowl, the latter being separated from the rest of the notogaster by a deep furrow which extends dorsolaterally. The vestiges of setae f 1 and f 2 are present. The integument is sculptured in a reticulate pattern. Ano-genital region (Fig. 22): The four pairs of anal setae (an 1 - 4) are more or less equal in length and located marginally while a single pair of minute adanals (ad) are located submarginally and rather far forward. The integument of the anal plate is rugose. There are nine pairs of minute genital setae (g 1 - 9) arranged in a pattern of 5 + 4 along the paraxial margins of the genital plates. A median longitudinal ridge with irregular thickenings separates a reticulate paraxial region from a rugose antiaxial region. Legs (Figs 25 - 26): The chaetotaxy and solenidiotaxy of the legs follows the typical Atropacarus pattern. All the solenidia are long and straight. On tarsus I the seta coupled with solenidion omega 2 is short and somewhat elongated distally. Seta a " is almost as long as the famulus and is located on a level with solenidion omega 1. Setae (tc) and (u) on tarsus I and (tc), (u), (p) and s on tarsi II to IV are ribbon-like, hooked distally and bear whorls of sharply pointed spicules in the middle third.	en	Kamill, B. W., Baker, A. S. (1980): The genus Atropacarus Ewing (Acari: Cryptostigmata). Bulletin of the British Museum of Natural History (Zoology series) 39: 189-204, URL: http://unknown
C9C49BCB6FA25A080AF16D60780A464D.taxon	materials_examined	Material: We have examined material collected in 1956 by Dr R. Schuster who recorded this species from oak litter in Vienna, and from heathland and Sesleria-grassland in Weiz, Austria.	en	Kamill, B. W., Baker, A. S. (1980): The genus Atropacarus Ewing (Acari: Cryptostigmata). Bulletin of the British Museum of Natural History (Zoology series) 39: 189-204, URL: http://unknown
C9C49BCB6FA25A080AF16D60780A464D.taxon	discussion	Remarks: Although Berlese's (1904) original description of phyllophorus from specimens collected in rotting leaves, Boboli Gardens, Florence is extremely superficial, his figures (Berlese, 1913) show the characteristic features of the species: long sensillus serrated distally; spatulate notogastral setae; anterior cowl on notogaster; reticulate integument. Schuster's redescription of phyllophorus, based on material collected in Austria, is adequate although no information is available on the chaetotactic pattern of the legs. The distribution of notogastral setae in A. phyllophorus is very similar to that shown for A. striculus. The additional seta is again located more or less mid-way between setae hx and ps, with vestigial f 1 located anterodorsally. The diagnostic features of A. phyllophorus are the notogastral cowl bearing setae c 1 - 3 and the strongly spatulate notogastral setae.	en	Kamill, B. W., Baker, A. S. (1980): The genus Atropacarus Ewing (Acari: Cryptostigmata). Bulletin of the British Museum of Natural History (Zoology series) 39: 189-204, URL: http://unknown
16EB4C0D34F46F318EFBDF773100C2D0.taxon	description	(Figs 27 - 29)	en	Kamill, B. W., Baker, A. S. (1980): The genus Atropacarus Ewing (Acari: Cryptostigmata). Bulletin of the British Museum of Natural History (Zoology series) 39: 189-204, URL: http://unknown
16EB4C0D34F46F318EFBDF773100C2D0.taxon	description	Aspis (Fig. 29): 164 - 208 ym in length. All the dorsal setae are short, stout and apparently simple. Setae (il) and (ro) are more or less equal in length and about twice as long as the lamellars (la). The sensilli are expanded and serrated distally, while the basal portion is smooth, slender and distinctly cranked. In front of the il-la row there is a pronounced and rather truncated median keel. The prodorsal integument is sculptured in a rugose pattern. Notogaster (Figs 27 - 28): The notogaster ranges in length from 276 - 352 ym with a greatest depth of 184 - 240 ym. There are 16 pairs of setae all of which are very short (less than c 1 - d 1), stout and apparently simple. Anteriorly there is a well defined cowl bearing setae c 1 - 3. The vestiges of setae f 1, and f 2 are present. The integument is rugose. Ano-genital region: There are four pairs of marginal anal setae (an 1 - 4) and a single pair of adanals (ad) located submarginally and rather far forward. Setae an 1 - 4 are more or less equal in length and distinctly longer than the adanals. On the genital plates the setal bases are difficult to discern owing to the rather opaque nature of the integument. However, there appear to be eight pairs of genital setae arranged in a pattern of 4 + 4 along the paraxial borders. The integument is rugose. Legs: The setal and solenidial formulae for the legs are as in A. striculus. All the solenidia are long and straight. On tarsus I the seta coupled with solenidion omega 2 is very short. Seta a " is almost as long as the famulus and located on a level with solenidion omega 2. Setae (tc) and (w) on tarsus I and (tc), (u), (p) and 5 on tarsi II-IV are ribbon-like, hooked distally and bear whorls of sharply pointed spicules in the middle third. Material: Eight ' cotypes' from oak litter, Bent Creek Experimental Forest, N. Carolina, U. S. A. The material was collected by Dr A. P. Jacot, 15 July 1935.	en	Kamill, B. W., Baker, A. S. (1980): The genus Atropacarus Ewing (Acari: Cryptostigmata). Bulletin of the British Museum of Natural History (Zoology series) 39: 189-204, URL: http://unknown
16EB4C0D34F46F318EFBDF773100C2D0.taxon	discussion	Remarks: The eight ' cotypes' examined are in good condition and mounted in Canada Balsam. They are undissected and although only partially cleared, most of the chaetotactic characters can be discerned. A. terrapene shows an overall similarity to A. phyllophorus. In both species the aspal keel is markedly truncated and the notogaster bears a well-developed cowl.	en	Kamill, B. W., Baker, A. S. (1980): The genus Atropacarus Ewing (Acari: Cryptostigmata). Bulletin of the British Museum of Natural History (Zoology series) 39: 189-204, URL: http://unknown
779D062469092293CA5B701C6FFAD07F.taxon	description	Survey	en	Kamill, B. W., Baker, A. S. (1980): The genus Atropacarus Ewing (Acari: Cryptostigmata). Bulletin of the British Museum of Natural History (Zoology series) 39: 189-204, URL: http://unknown
779D062469092293CA5B701C6FFAD07F.taxon	discussion	In addition to the species referred to above, a number of other taxa, possibly referable to Atropacarus, have been considered but unfortunately type material has not been available in the case of the following six species, all of which fall within the size range given for Atropacarus: illinoisensis (Ewing, 1909), vitrinum, remigerus and somalicus (Berlese, 1913, 1923 & 1923), serratus Feider and Suciu (1957), and collaris Balogh (1958). In his original description of Atropacarus, Ewing (1917) noted that illinoisensis, of which the type specimen is apparently lost, was ' known to be included in the genus Atropacarus. '' Although from the description and illustration the species does appear to have certain affmities with Atropacarus (sickle-shaped sensillus, stout pectinate notogastral setae, overall length 450 ym), the number and arrangement of setae on the anal plates (two marginal and three submarginal) are reminiscent of Phthiracarus. Moreover, the general shape of the aspis and the form of the integumental ornamentation are characteristic of a Phthiracarus species. The true identities of the three species described by Berlese are doubtful, although it seems probable that they have been correctly assigned to the genus Steganacarus. Van der Hammen (1959) has examined each of the species which are entire, uncleared and mounted in Canada Balsam, and is of the opinion that they belong to a ' striculus-group'. However, it seems unlikely that they can be reidentified in their present condition. In their original description of Steganacarus serratus, a species recorded from mosses and leaves, Odorhei, Rumania, Feider and Suciu (1957) described the presence of 14 pairs of notogastral setae. However, it is apparent from their figure that serratus bears at least 16, or possibly even 19 pairs of setae on the notogaster. Unfortunately, there is no information available on the chaetotactic pattern of the legs but it is conceivable that the species may belong to the genus Atropacarus. Steganacarus collaris, a species described from Angola (Balogh, 1958), cannot be determined as a member of the genus Atropacarus without a re-examination of the holotype for Balogh's description does not include details of any notogastral or leg chaetotactic characters. The holotype of Steganacarus craterifer, collected by Hammer (1971) from dry leaves on Viti Levu, the Fiji Islands, has been examined. This species is of particular interest for it shares with all species of the genus Atropacarus the presence of a coupled solenidion on tibia IV while only possessing 15 pairs of setae on the notogaster (Hammer figures only 14 pairs). However, the general shape of the aspis and the form of the integumental ornamentation are reminiscent of species of the genus Tropacarus. The arrangement of setae on the genital and anal plates are nevertheless characteristic of Steganacarus.	en	Kamill, B. W., Baker, A. S. (1980): The genus Atropacarus Ewing (Acari: Cryptostigmata). Bulletin of the British Museum of Natural History (Zoology series) 39: 189-204, URL: http://unknown
