Genus Paroxyplax Cai, 1984

Paroxyplax Cai, 1984, Acta Entomol. Sin. 27 (2): 211, 213.

Type species: Paroxyplax menghaiensis Cai, 1984, by original designation.

Note. The genus includes middle-sized moths with brownish ground color. The male antennae are bipectinate till to the tip, with a cluster of long scale tuft at distal 1/4; female antennae are filiform. The labial palpi are slightly up-curved, but not reaching beyond the frontal tuft. The thorax and abdomen are stout, densely covered with scales; the base of tegula bearing an erect angled scale tuft, the same tuft also present at the middle of metathorax and basal segment of dorsally abdomen. The basal half of the costal margin in the forewing are straight, the distal half are slightly arched; the apes is pointed; the tornus is rounded. The tibial spurs are 0-2-4.

The male genitalia are highly modified, the uncus is very short; the gnathos is divided into upper and lower parts; the valva is slender, with a distinct, large, horn-shaped process at the base of the costa; the juxta is developed. The phallus is moderately stout and straight, usually split at the terminal part.

In the female genitalia, the papillae anales is broad; the anterior apophyses is short, whereas the posterior apophyses is slender; the lamella postvaginalis is large, but without the plate-shaped process; the ductus bursae is short and straight; the corpus bursae is large, without signa.