Uenaxonopsis Imamura, 1961

Smith, Ian M., Cook, David R. & Gerecke, Reinhard, 2015, Revision of the status of some genus-level water mite taxa in the families Pionidae Thor, 1900, Aturidae Thor, 1900, and Nudomideopsidae Smith, 1990 (Acari: Hydrachnidiae), Zootaxa 3919 (1), pp. 111-156 : 144-145

Genus Uenaxonopsis Imamura, 1961

Uenaxonopsis: Cook, 1974a , pp. 330–331, figs. 1383, 1387–1389.

Diagnosis. Larva: Unknown.

Adults (modified from Cook 1974a): Known only from male. Character states of Axonopsis -like mites. Dorsal and ventral shields broadly fused anteriorly; lacking caudal development posteriorly. Dorsal furrow lacking glandularia, bearing one pair of lyrifissures. Dorsal shield bearing two pairs of glandularia one of which flanks excretory pore. Ventral shield bearing weakly developed ridges originating at lateral end of suture line between third and fourth coxal plates extending anterolaterally to lateral edge of shield; anterior coxal plates relatively wide and lacking hook-like projections; fourth coxal plate bearing one pair of glandularia in region between genital field and opening for insertion of fourth leg, located immediately lateral to genital field. Genital field bearing two pairs of acetabula. Suture lines between genital field and ventral shield moderately distinct. Gnathosoma with mouth opening terminal in position; gnathosomal apodemes relatively short. Pedipalp tibia relatively long and slender, lacking a thick seta ventrally and bearing two sessile slender seta laterally; tarsus shorter than tibia. Fourth leg with segments not flattened and telofemur not reduced in size.

Type species. Uenaxonopsis nazensis Imamura.

Species included. Uenaxonopsis nazensis Imamura ( Japan) (monobasic).

Distribution. Japan.

Discussion. Cook (1974a) considered Uenaxonopsis to be a distinct genus, with reservations, and we follow that treatment here.