The species etymology is based on the type of locality near Sapa.

[3] The eggs are ovoid, with the collar absent, and the chorion smooth.

[3] The adult males have numerous small spines scattered over the dorsum and margin of the basal cercal segment.

The adult females have a slightly produced, emarginate subgenital plate similar to other known Cerconychia (Uchida & Isobe 1989).

The forewing length measures 16.5‐18mm, making it greater than the 9‐16mm composite range given for the Taiwanese species.