Irepacma magnisaccata, Wang, Jing-Jing & Wang, Shu-Xia, 2011

Wang, Jing-Jing & Wang, Shu-Xia, 2011, Two new species of the genus Irepacma Moriuti, Saito & Lewvanich (Lepidoptera: Oecophoridae) from Guizhou Province, China, Zootaxa 2837, pp. 86-88 : 87

Irepacma magnisaccata , sp. nov.

( Figs 3 – 4 )

Type material. Holotype 3, China: Kuankuoshui (28º14'N, 107º12'E), Guizhou Province, 1500 m, 5.vi.2010, genitalia slide no. WJJ10016, coll. Linlin Yang; paratype: 1 3, same data as for holotype.

Diagnosis. This new species is superficially close to I. spinellosa Wang, 2006 , but can be distinguished by the male genitalia with a band-shaped gnathos, a thumb-shaped process in the middle of valva and the phallus with two clusters of spines.

Description. Adult ( Fig. 3 ): Male wingspan 23.0–23.5 mm. Head greyish yellow. Labial palpus pale ochreous yellow, sparsely mixed with greyish brown scales on outside of second segment. Antenna with scape brown on dorsal surface, pale ochreous yellow on ventral surface; flagellum dark brown except basal 1/5 pale yellow on ventral surface. Thorax, tegula and forewing dark brown. Forewing with costal margin slightly arched, apex protruded, termen oblique; cell with an obscure black spot at end; cilia dark brown. Hindwing and cilia dark brown. Fore- and midlegs yellowish grey on dorsal surface, greyish brown on ventral surface; hindleg greyish-brown on outside, yellowish-grey on inside.

Male genitalia ( Fig. 4 ): Uncus broad basally, gradually narrowed distally, rounded at apex; roughly as long as tegumen. Gnathos narrowly banded, extremely weak, almost membranous. Valva nearly rectangular in shape, with dense hairs distally; apex rounded, concave ventro-apically; ventral margin sclerotized, slightly concave beyond middle; sclerotized thumb-shaped process present in middle of valva, with sparse setae; costa sclerotized, with a small triangular projection at base. Sacculus triangular, heavily sclerotized. Saccus broad triangular, nearly as long as height of uncus. Juxta short rectangular, about 1/3 length of saccus. Phallus with basal 1/3 clubbed, bearing a cluster of short spines medially, distally rostriform, with a large cluster of dense spines.

Female unknown.

Distribution. China (Guizhou).

Etymology. The specific epithet is derived from the Latin adjective magnus (large), and the word saccatus, referring to the large saccus in the male genitalia.

Figures

FIGURES 1 – 4. Irepacma species. 1 – 2, I. cordata sp. n.; 3 – 4 I. magnisaccata sp. n.; 1, 3, Adults; 2, 4, Male genitalia.