Pyroderces bifurcata Zhang & Li

Zhang, Zhiwei & Li, Houhun, 2009, The genus Pyroderces Herrich-Schäffer new to China, with description of a new species (Lepidoptera, Cosmopterigidae), Zootaxa 2272, pp. 63-68 : 65-68

Pyroderces bifurcata Zhang & Li , sp. nov.

( Fig. 3 )

Type material. Holotype: ɗ, China: Wuqing District (39°22΄ N, 117°03΄ E), Tianjin, 15 m, 21. July 2005, leg. Houhun Li et al., genitalia slide No. ZZW07183. Paratypes: 1 ɗ, 3 ΨΨ, Wuqing District (39°22΄ N, 117°03΄ E), Tianjin, 15 m, 20–21. July 2005, leg. Houhun Li et al.; 1 ɗ, Longquan, Lishui City (28°05΄ N, 119°07΄ E), Zhejiang Province, 1470 m, 31. July 2007, leg. Qing Jin; 1 ɗ, Mt. Jiuhua (30°32΄ N, 117°47΄ E), Anhui Province, 8 Aug. 2004, leg. Jiasheng Xu and Jialiang Zhang; 1 Ψ, Mt. Jinpen (25°27΄ N, 114°58΄ E), Jiangxi Province, 18. July 2006, leg. Jiasheng Xu and Weichun Li; 2 ɗɗ, 1 Ψ, Xinhua County (27°45΄ N, 111°18΄ E), Hunan Procince, 6–8. Aug. 2004, leg. Yunli Xiao; 1 ɗ, Jiangkou (27°41΄ N, 108°50΄ E), Guizhou Province, 600 m, 28. July 2001, leg. Houhun Li and Xinpu Wang; 1 ɗ, 1 Ψ, Yanhe County (28°34΄ N, 108°29΄ E), Guizhou, 430 m, 10–11. June 2007, leg. Xicui Du.

Diagnosis. The new species shows similarities to P. sarcogypsa , but can be separated from it by the forewing having a black streak extending upward from distal 1/4 of fold to the lower corner of the cell and having six conspicuous white streaks on distal 2/5; in the male genitalia, the left brachium is bifurcate at apex and the manica is acute at apex; in the female genitalia, the indistinctly paired signa consist of sparse spines. In P. sarcogypsa , the forewing has a rather short black streak along fold at about distal 1/4 and is inconspicuously streaked distally; in the male genitalia, the left brachium is rodlike distally and the manica is blunt at apex; in the female genitalia, the paired signa consist of densely compact spines.

Description. Adult ( Fig. 3 a): Wingspan 11.5–13.5 mm. Head white. Eyes red. Antennae dark grey or pale yellow, scape with pecten on basal half, flagellum slightly serrate, annulated with black dorsally. Labial palpi pale yellow; third segment mottled ochreous yellow on lateral side, black on dorsal half. Thorax white, tinged with pale ochreous yellow medially; tegulae greyish yellow to ochreous brown. Forewings greyish ochreous brown or deep ochreous brown, white along distal 3/4 of costal margin, yellowish white from below fold to dorsum; yellowish white line extending from 1/6 to 1/3 along below costa, then curved and obliquely reaching middle of dorsal margin, becoming faint from fold, edged with dark brown scales along inside, with a black dot at outside where it curves; yellowish white streak from distal 1/4 of fold reaching upward to about end of cell, a short black streak along its outside reaching lower corner of cell; distal 2/5 with six white streaks extending along veins to costal margin, apex and termen, the one from tornus along termen to apex the longest and curved; cilia pale ochreous yellow along distal part of costal margin, grey along termen. Hindwings and cilia deep grey. Forelegs black on outer surface of femora, black on inner surface of tibiae and tarsi, the remainder pale yellow. Mid- and hindlegs dark yellow; hind tibiae with oblique white stripes at base, middle and distal of inner surface.

Male genitalia ( Fig. 3 b): Pleural lobes of eighth segment elongate, same width as and 3/4 length of valvae, rounded at apex. Left brachium half as long as right one, bent at middle, bifurcate apically; right brachium strong, bent at middle, slightly narrowed and beak-shaped distally. Tegumen somewhat trapezoid. Valvae narrowed slightly at base, slightly concave on dorsal margin, slightly convex on ventral margin, rounded terminally; basal lobes rounded, setose. Left valvella rodlike, as long as manica, with sparse setae; right valvella absent. Manica narrowed distally, acuminate at apex. Phallus short, cone-shaped, half as long as manica.

Female genitalia ( Fig. 3 c): Papillae anales membranous, densely setose. Apophyses posteriores about 1.5 times length of apophyses anteriores. Ostium covered by right 2/3 of sterigma; sterigma rectangular, inner surface with a sclerotized crescent-shaped plate at left of ostium. Ductus bursae long and narrow, 1.5 times length of apophyses posteriores, basal 2/3 partially sclerotized, the remainder membranous; ductus seminalis arising from posterior end of corpus bursae, as broad as ductus bursae. Corpus bursae oval, membranous, with dense small spines, slightly longer than ductus bursae; signa paired, each consisting of sparse spines of same shape and size, about half length of corpus bursae.

Distribution. China (Anhui, Guizhou, Hunan, Jiangxi, Tianjin).

Etymology. The new specific name is derived from the Latin prefix bi- = two, and the word furcatus = furcate, in reference to the bifurcate apex of the left brachium.

Figures

FIGURE 3. Pyroderces bifurcata Zhang & Li, sp. nov. a, adult, holotype; b, male genitalia, holotype (gen. slide No. ZZW 07183); c, female genitalia, paratype (gen. slide No. ZZW 07318)