Organopoda deltaformis sp. nov.

Figs 4, 13, 20

Organopoda carnearia sensu Han & Xue, 2002, in Huang, Insects of Hainan Island: 550. (Misidentification)

Type material. Holotype, ♂, CHINA: Hainan: Baisha, Nankai, Nanmaola, 1261 m, 12–14.V.2009, coll. Yan Keji. Paratypes: Hainan: 1♂ 1♀, same to holotype (slide no. 3460); 1♂ 3♀, Jianfengling, 30.VII.1981, 14.IV.1983, 4.V.1983, 21.XII.1983, coll. Gu Maobin & Liu Yuanfu (slide no. 3461) ; 1♂, Jianfengling, Tianchi, 828 m, 1– 5.V.2007, coll. Chen Fuqiang ; 2♀, Lingshui, Diaoluo Shan, 920 m, 29.III.2008, coll. Lang Songyun ; 1♀, Bawan- gling, Dong’er linchang, 1015 m, 8–10.V.2007, coll. Chen Fuqiang ; 1♂ 1♀, Wuzhi Shan, Shuiman, 730–900 m, 8, 11.V.2007, coll. Chen Fuqiang ; 1♂, Ledong, Jianfengling, Tianchi, 808 m, 18.V.2009, coll. Chen Fuqiang ; 1♀, Qiongzhong, Limu Shan, Qijia, 645 m, 3–4.IV.2010, coll. Jiang Nan. Sichuan: 1♂, Tengchong, Qushi daba, 1823 m, 5.VIII.2013, coll. Liu Shuxian. All in IZCAS.

Description. Head. Antennae weakly serrate in male and filiform in female, shaft scattered with short cilia; dorsal side covered with white scales at base. Frons deep reddish, not protruding. Labial palpi reddish brown on dorsal side and yellow on ventral side, third segment slightly extended, about two thirds length of second segment, extending beyond frons. Vertex pale white.

Thorax. Patagia deep greyish brown. Tegulae and thorax greyish brown. Forewing length: male 13–17 mm, female 15–17 mm. Hindwing with rounded apex and outer margin. Wing colour deep yellowish brown; transverse lines serrate. Forewing with antemedial line brown, serrate and indistinct; discal spot small and black ringed, with white scales on center; medial and postmedial line dentate; medial line brown, wavy and indistinct; postmedial line sometimes forming black spots on veins; terminal line short bar-like between veins, with small protrusion centrally; fringes deep yellowish brown. Hindwing with discal spot larger than that of forewing; postmedial and terminal line same as forewing; fringes same as forewing. Underside. Colour paler reddish brown; discal spots more indistinct than those of upperside; other transverse lines similar to those of upperside.

Male genitalia (Fig. 13). Uncus slender, apical half stick-shaped with two small processes on ventral side, covered with long bristles. Gnathos narrow and even in width. Valva deeply concave at apex; a small triangular process present on inner side of costa; sacculus with a small triangular process near basal part. Saccus small. Aedeagus acute at apex with a small spur subapically.

Female genitalia (Fig. 20). Lamella postvaginalis almost triangular, rounded apcially. Lamella antevaginalis broad with strongly serrate margins and a pair of small diverticula centrally. Ostium strongly sclerotized. Ductus bursae narrow and membranous with a strongly sclerotized hood-like structure associated with ostium. Ductus seminalis arising from posterior part of ductus bursae. Corpus bursae large and long oval, posterior part scattered with small spurs; signum narrow and concave on posterior margin, covered with spurs on surface. Sternite 7 with a pair of rounded lateral depressions.

Diagnosis. O. carnearia, O. acutula, O. annulifera and O. deltaformis share similar wing patterns. However, O. deltaformis differs from the other three species by the smaller and rounder discal spot on the hindwing. In the male genitalia, O. deltaformis and O. annulifera have a concave apex of the valva. But O. deltaformis can be distinguished from O. annulifera by the following characters: the costal process of the valva is narrow in O. deltaformis, but stout and slightly pointed in O. annulifera; the saccular process is small and triangular in O. deltaformis, while in O. annulifera, it is short digitiform and rounded with spurs terminally. The diagnosis of the female genitalia is under O. acutula .

Distribution. China (Hainan, Sichuan).

Etymology. The species name refers to the triangular saccular process.