Genus Sinoderces Li & Li, 2017

Type species.

Sinoderces nawanensis Li & Li, 2017

Diagnosis.

The genus is distinguished (together with Thaiderces Li & Li, 2017) from all the other genera in Psilodercidae by the absence of an apical protrusion on the male cymbium. It is distinguished from the genus Thaiderces by the presence of a single tooth on the cheliceral retromargin and the long embolus of the palpal bulb (Liu et al. 2017).

Cheliceral promargin with lamina, retromargin with a tooth or denticle; palpal bulb with long embolus; conductor present or absent-if present, then embolus and conductor separated basally; female with two pairs of elongate, curved spermathecae (Liu et al. 2017).