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.