taxonID	type	description	language	source
038A054BFFDDFFB23BE3FD09FAF85289.taxon	description	(Haller) are best known. Both species are additionally represented by subspecies within their North American range: C. bipilis spinipes (Banks) (also C. bipilis brevicuspis (Jacot) — later synonymised with C. bipilis by Jacot (1936) — and C. quadridentata arctica Hammer, respectively (Marshall et al. 1987). In North America C. quadridentata arctica is more commonly reported than the nominate C. quadridentata, which is recorded only from Alaska (Bohnsack 1973); the latter record is likely C. quadridentata arctica as there is considerable variation reported within C. quadridentata (Aoki 1969), and C. quadridentata arctica is common in Alaska (Hammer 1955). Both C. bipilis and C. quadridentata arctica are widespread in arctic, subarctic, boreal and temperate areas, and overlap in the western subarctic and arctic areas (Alaska, Yukon, Northwest Territories, and Nunuvut) with C. sexpilosa Willmann, and C. sphaerica (L. Koch). The subspecies C. bipilis spinipes is recorded from eastern North America including Ontario, Connecticut, Maine, Maryland, New Hampshire, Virginia and West Virginia (Marshall et al. 1987). The validity of both subspecies C. quadridentata arctica and C. bipilis spinipes requires confirmation as both C. bipilis and C. quadridentata arctica display a wide variety of body size across their North American distributional range. Observed specimens of C. bipilis spinipes also display considerable variation in body size. Lindo (2011) recently described five new species of Ceratoppia from Pacific coastal North America with overlapping distributions but differing in habitat preference. Three of these species were described primarily or solely from arboreal habitats C (. longicuspis, C. tofinoensis, C. valerieae), one species was collected solely from bark habitats (C. offarostrata), and one species collected solely from forest floor soils (C. indentata). Distributions of C. indentata, C. longicupsis, and C. valerieae span the North American Pacific coastline from north-central British Columbia, Canada, to north-central California State. It was noted that C. indentata has increasing morphological variation in the southern extent of its distribution. Ceratoppia valerieae has the most expansive distribution longitudinally, being found in arboreal habitats near the coast and dry ground habitats in interior Washington State and southern British Columbia. Ceratoppia tofinoensis is less commonly sampled and appears to be restricted to coastal Oregon and Washington, and the west coast of Vancouver Island, British Columbia. The fifth species from western North America, C. offarostrata, named for a large ‘ hump’ on the rostrum, is known only from a few locations on Vancouver Island and Haida Gwaii, British Columbia. Morphological variation in C. offarostrata on Haida Gwaii needs to be compared with that of C. sphaerica; the distributional patterns of C. sphaerica suggest this species is limited to arctic and subarctic areas in western Canada, however, C. offarostrata shares several character states, and may be a southern variant subspecies of C. sphaerica.	en	Lindo, Zoë (2018): Diversity of Peloppiidae (Oribatida) in North America. Acarologia 58 (8): 91-97, DOI: 10.24349/acarologia/20184282, URL: http://dx.doi.org/10.24349/acarologia/20184282
038A054BFFDCFFB23BE3FDCBFB88574D.taxon	description	and the second, Dendrozetes jordani Lindo Clayton & Behan-Pelletier, that also occupies arboreal habitats in coastal North America. The two species are differentiated by the number of prominent posterior setae (h series) with D. caudatus possessing two pairs, and D. jordani possessing a single pair. Dendrozetes jordani shares an arboreal habitat lifestyle with its congener, being found on bare branch tips of mostly conifer species, e. g. western hemlock (Tsuga heterophylla (Raf.) Sarg) (Winchester et al. 2008). Dendrozetes jordani has been collected only from seven locations, six of which are on Vancouver Island, British Columbia and the seventh in Washington State, however given its strictly arboreal habitats, it may be under-sampled and more widespread than records indicate.	en	Lindo, Zoë (2018): Diversity of Peloppiidae (Oribatida) in North America. Acarologia 58 (8): 91-97, DOI: 10.24349/acarologia/20184282, URL: http://dx.doi.org/10.24349/acarologia/20184282
038A054BFFDBFFB43BE3F9B7FB7B51DE.taxon	description	This raises a question about the distinctness of Pyroppia and Parapyroppia. In two cases I have observed single specimens of each genus, collected at the same sample location, which have very similar character states with the exception of pretarsal claw number. Intraspecific variability in claw number has been reported in Acrotritia ardua (C. L. Koch) (Lions 1964), and Ameronothrus schneideri (Oudemans) (Boelé and van der Hammen 1982), however Shimano (2004) considered that variation in other traits was sufficient to consider monodactylous and bidactylous specimens of A. ardua to be separate species. Whether difference in claw number as the main morphological distinction warrants separating the genera Parapyroppia and Pyroppia will require close examination of the undescribed species from eastern North America, especially in locations where the two genera co-occur.	en	Lindo, Zoë (2018): Diversity of Peloppiidae (Oribatida) in North America. Acarologia 58 (8): 91-97, DOI: 10.24349/acarologia/20184282, URL: http://dx.doi.org/10.24349/acarologia/20184282
