Tridrepana sadana, Moore, 1865

Song, Wenhui, Xue, Dayong & Han, Hongxiang, 2011, A taxonomic revision of Tridrepana Swinhoe, 1895 in China, with descriptions of three new species (Lepidoptera, Drepanidae), Zootaxa 3021, pp. 39-62 : 44

Group sadana Moore

In this species group, the brown discal and mid-cell spots, the white posterodistal spot ringed with brown are present on the upperside of the forewing; two round brown patches often with a dark ovate spot inside are near the lower angle of the cell. A patch near the lower angle of the cell and a patch between M 3 and CuA 1 are present on the upperside of the hind wing. In the male, the eighth tergite is nearly trapezoidal; the eighth sternite is small, often triangular or semicircular; the uncus is very broad, slightly bifurcate or shallowly concave to form two semicircular or quadrate lobes; the socii are digitiform; the anellus is not developed; the valva is short, thick and digitate; the aedeagus is stout; the cornutus is a fascicle of strong spines. In the female, the dorsal lobes of the ostial segment are often broad and round.