Irepacma bifida, Wang & Li, 2005

Wang, S. & Li, H., 2005, The Genus Irepacma (Lepidoptera: Oecophoridae) From China, Checklist, Key To The Species, And Descriptions Of New Species, Acta Zoologica Academiae Scientiarum Hungaricae 51 (2), pp. 125-133 : 130-131

Irepacma bifida sp. n.

( Figs 2 , 6 , 11–12 )

Holotype: male, Mt. Fanjing (27.55°N, 108.41°E), Guizhou Province, alt. 1700 m, 1.VI.2002, leg. Xinpu Wang.

Paratypes: 2 males and 3 females, 28.V–1.VI.2002, same locality as holotype .

Diagnosis. This species may be separated from all the other described congeners by the following characters: the fore wings evenly deep gray; in the male genitalia, gnathos distinctly divided into two sclerotized lunate plates; in the female genitalia, signum very large, spiniform, with small teeth at the recurved edge.

Description: Adult ( Fig. 2 ). Wingspan 18.0–24.0 mm. Head pale orange yellow. Labial palpi somewhat pale ocherous yellow, ending in point. Antennae grayish yellow, with brown rings. Thorax and tegulae deep gray. Fore wings evenly deep gray; costal margin arched; termen oblique; apex roundly protruded; cilia gray, tinged with yellowish brown. Hind wings and cilia gray. Legs pale yellowish white, with pale gray scales on outside.

Male genitalia ( Fig. 6 ). Uncus small, triangular in shape. Gnathos large and sclerotized, distinctively divided into two sclerotized lunate plates, finely haired; lateral arms as long as lunate plate. Tegumen broad, with anterior margin deeply concave, lateral sides wide, greatly extended. Valvae relatively broad except for narrowed basal 1/3; costa slightly concave beyond middle, convex near apex and forming small subtrianglular projection; dorso-proximal process absent. Sacculus slightly longer than half of valva; basal 1/3 of dorsal margin sclerotized, with a small rounded process distally pointing upward; forked from about basal 1/3 and forming two large processes having rounded apex: dorsal process short, with large setae distally; ventral process larger and longer, with fine hairs. Saccus large and broad, roughly triangular, weakly sclerotized, distally with papilla. Juxta relatively small, a pair of weakly sclerotized, narrowed plates curved inward. Aedeagus slender; basal 1/3 very thin, expanded at base; middle portion straight, parallel-sided; distal 1/4 composed of a few long spines.

Female genitalia ( Figs 11–12 ). Papillae anales short and broad, quadrate. Apophyses posteriores longer than papillae anales. Eighth sternite posteriorly with two sclerotized, transversal plates; lamella antevaginalis large, dumbbell-like, sclerotized. Antrum heavily sclerotized, irregularly trapezoidal, a little shorter than papillae anales; posterior margin concave, laterally more or less projected. Ductus bursae partially sclerotized. Corpus bursae a little longer than ductus bursae, elliptical. Signum very large, spiniform, expanded basally, with small teeth at the recurved edge.

Distribution: China (Guizhou).

Etymology: The epithet of this new species is from the Latin bifidus (split in two), in reference to the shape of gnathos.

Figures

Figs 1–4. Adults of Irepacma spp. 1= I.curva sp.n. (holotype, male); 2 = I. bifida sp.n. (paratype, female); 3 = I. lanceolata sp. n. (holotype, male); 4 = I. abnormis sp. n. (holotype, male)

Figs 5–8. Male genitalia of Irepacma spp.: 5 = I. curva sp. n. (holotype, slide no. W01299); 6 = I. bifida sp.n. (holotype, slide no.W01252); 7 = I. lanceolata sp.n. (holotype, slide no.W03029); 8 =I.

Figs 9–12. Female genitalia of Irepacma spp.: 9–10 = I. curva sp. n. (paratype, slide no. W01300); 11–12 = I.bifida sp.n.(paratype, slide no.W01253); 9, 11 = ostium and genital plate; 10, 12 = magni-