Organopoda Hampson, 1893

Cui, Le, Xue, Dayong & Jiang, Nan, 2019, A review of Organopoda Hampson, 1893 (Lepidoptera, Geometridae) from China with description of three new species, Zootaxa 4651 (3), pp. 434-444 : 435

Organopoda Hampson, 1893

Organopoda Hampson, 1893 , Illust. typical Specimens Lepid. Heterocera Colln Br. Mus., 9: 38, 147. Type species: Anisodes carnearia Walker, 1861 .

Generic characters. Head. Antennae weakly serrate in male and filiform in female, shaft scattered with short cilia, longer in male. Frons not protruding. Labial palpi usually elongate, except in O. atrisparsaria Wehrli, 1924 and O. brevipalpis Prout, 1926 . Hindtibia in male possess with a cluster of long bristles at anterior part and a pair of spurs (one long and narrow, and the other black with short yellowish hairs, very dilated and scoop-shaped); hind tarsus with first segment very dilated and scoop-shaped, and fringed with short hairs (fig. 17); hindtibia in female with two pairs of spurs. Venation. Forewing with two areoles; veins R 1 and R 5 arising before apex of the angle of the second areole; veins R 2-4 stalked arising from apex of the angle of the second areole; hindwing with veins Rs and M 1 short stalked, veins M 3 and CuA 1 separate. Forewing with apex slightly pointed, outer margin slightly arched; hindwing with apex rounded. Wings with transverse lines often serrate, sometimes indistinct and spot-like on veins; discal spots rounded, sometimes with pale scales centrally.

Male genitalia. Uncus long and narrow, apical half usually dilated, with two protrusions and long bristles on ventral side, rounded at tip. Socii absent. Gnathos well developed. Valva broad, often with projections from costa or sacculus; saccus small, usually protruding. Aedeagus usually thick, terminally pointed, sometimes with a spur subapically; vesica without cornutus. Sternite 8 usually weakly concave at middle of posterior margin.

Female genitalia. Papillae anales broad, usually stout and short. Lamella postvaginalis well developed. Lamella antevaginalis connected with the latter. Ductus bursae long and narrow with a sclerotized hood-like structure associated with ostium. Ostium small and strongly sclerotized. Ductus seminalis usually arising from posterior part of ductus bursae. Corpus bursae very large and elongate, membranous, sometimes scobinate with small spurs on posterior surface; signum composed of two adjacent rounded depressions covered with small spines on surface. Sternite 7 usually sclerotized and containing depressions or protrusions.

Diagnosis. The genus is similar to Discoglypha Warren, 1896 , but it is different in the following characters: the labial palpi in Organopoda are usually longer than Discoglypha ; the male hindtibia has a pair of spurs in Organopoda , but only one spur in Discoglypha ; the discal spot of the hindwing is black ringed and pale-centered in Organopoda , while it is yellow and irregular in Discoglypha . In the male genitalia, the aedeagus in Discoglypha often contains strongly sclerotized structures, while it does not have similar structures in Organopoda . In the female genitalia, the lamella postvaginalis in Organopoda is usually well developed and connected with the lamella antevaginalis, while it is not developed in Discoglypha .

Distribution. The Palaearctic, Oriental, and Australian regions.

Host-plant. Larvae have been recorded on Machilus (Lauraceae) ( Holloway 1997).