Polyptychus dentatus
Similar to Polyptychus trilineatus trilineatus and Polyptychus chinensis chinensis but distinguishable by the straight submarginal line between M2 and CuA2. Forewing outer margin strongly crenulated. Forewing upperside ground colour grey-brown with darker brown transverse lines; antemedial, postmedial and submarginal lines well-developed and almost straight; medial line sinuous and inconspicuous; a strongly serrate line present between postmedial and submarginal lines.
Male genitalia: Uncus not strongly narrowing apically, apex emarginate with pointed angles. Gnathos median lobe large, deeply divided into two apically rounded lobes. Valve sole-shaped; stridulatory scales absent. Harpe with a short, spatulate submedial process and a long spine-like ventral process. Phallus with a very long and slender apical process that is recurved anteriorly and somewhat moveable basally somewhat.
Female genitalia: Eighth tergite trilobate, median lobe very short. Sterigma markedly different from Polyptychus trilineatus trilineatus; lamella antevaginalis convex, raised at ostium bursae into a thick, convex ridge and with a median lobe; lamella postvaginalis not strongly sclerotized, sunken, triangular.