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 Pleodamaeus Paschoal 1982 (p. 449 in Paschoal & Johnston, 1982 ) Type species: Gymnodamaeus plokosus Woolley & Higgins, 1973 a Diagnosis: Gymnodamaeidae with ventral plate lacking both anogenital bridge and lateral pits; genital plates with smooth median margin and bearing 7 pairs of setae, seta g 2 inserted posteriad g 1; 2 pairs of adanal setae. Legs without retrotecta on distal segments, femur IV with 3 setae. Prodorsum with spherical pustules, without X-shaped cerotegumental ridges; sensillus ( bo ) with long stalk and elongate, barbed head; bothridial rim simple, bothridial ridges arising mediad bothridia, interlamellar seta ( in ) spine-like, inserted on apophysis and forming enantiophysis with median prodorsal tubercle ( Fig. 30 ); exobothridial seta ( ex ) inserted posteriad in ; rostral seta ( ro ) inserted at similar level to lamellar seta; lamellar seta ( le ) sinuate, inserted at steep anterior base of transverse prelamellar ridge ( Fig. 31 ); pedotectum II produced into a point laterally ( Fig. 31 ). Notogaster flattened, with shallow rim ( Fig. 27 ) and anterior field of coarse tubercles ( Figs. 29–30 ), without radiating cerotegumental folds or posterior median nipple, with 5 pairs of setae ( h 1-2, p 1-3), setae h 1 inserted on posterior folds of notogastral rim, others sessile or on short apophysis; cerotegument with spherical pustules ( Fig. 28 ), raised ridges or cells not present; sejugal tubercle short, spur-like.