Genera of Gymnodamaeidae (Acari: Oribatida: Plateremaeoidea) of Canada, with notes on some nomenclatorial problems Author Walter, David Evans text Zootaxa 2009 2206 23 44 journal article 10.5281/zenodo.189740 8dc3930d-f5da-496f-a86f-f0da1543811a 1175-5326 189740 Joshuella Wallwork, 1972 Type species: Joshuella striata Wallwork, 1972 Diagnosis: Gymnodamaeidae with ventral plate having anogenital bridge ( Fig. 23 arrow), but not lateral pits ( Fig. 23 ); genital plates with smooth median margin and bearing 6 pairs of setae, seta g 2 inserted posteriad g 1; 2–3 pairs of adanal setae. Distal segments of legs without retrotecta, femur IV with 2 setae. Prodorsal cerotegument with spherical pustules, without raised ridges ( Fig. 22 arrow); sensillus ( bo ) with long stalk and broad, barbed head; bothridial rim simple, bothridial ridge absent; spine-like interlamellar setae ( in ) on short apophysis between bothridia, directed dorsally; median prodorsal tubercle absent; exobothridial seta ( ex ) inserted anteriad in ; prelamellar ridge poorly developed, without steep anterior margin; rostral seta ( ro ) inserted posteriad lamellar seta ( le ) which curves ventrad. Notogaster flattened, without posterior nipple, cerotegument forming a series of parallel longitudinal ridges ( Fig. 22 arrow), and with large (mostly 3–5 in diameter) spherical ( Fig. 25 ) or bullet-shaped pustules, 4 pairs of relatively short notogastral setae ( h 1, p 1-3) ( Fig. 24 ); sejugal tubercle absent.