Torodora costatiprolata Yu et Wang 2022, sp. nov.

Torodora costatiprolata Yu et Wang, sp. nov.

(Figs 4, 22, 39)

Type material. CHINA, Yunnan: Holotype ♂, Taiyanghe (22º37′N, 101º01′E), Pu’er, 1450 m, 23.VIII.2014, leg. ZG Zhang, slide No. YS 20140. Paratypes (12♂ 4♀): 9♂ 4♀, same data as holotype except dated 31.III‒28.VIII.2014, slide Nos. YS 20318 ♀, YS20319 ♀; 2♂, Ruili Rare Botanical Garden, 1000 m, 5‒7.VIII.2005, leg. YD Ren, slide No. ZYM06084, ZYM06377; 1♂, Guanping, Mengyang, 1200 m, 18.VIII.2005, leg. YD Ren, slide No. ZYM06070.

Diagnosis. This new species can be distinguished from its congeners in the male genitalia by the narrow, almost tubular cucullus about 4/5 the length of the valva, and the costa with a large digitate process subbasally.

Description. Adult (Fig. 4). Wingspan 13.0‒14.0 mm.

Head greyish white, except occiput brown. Antenna with scape brown except pale yellow on anterior and posterior margins; flagellum orange white, ringed with blackish brown. Labial palpus with second palpomere brown except pale yellow at apex, mixed with pale yellow scales on inner surface; third palpomere pale yellow dorsally, dark brown ventrally, as long as second palpomere.

Thorax and tegula brown. Forewing with costal margin nearly straight except slightly arched basally, apex roundly produced, termen shallowly concave; ground color dark brown; costal spot orange white, wedge-shaped, at distal 1/5; discocellular stigma blackish brown, small, rounded; fringe blackish brown, tipped with orange white, basal line pale yellow. Hindwing and fringe pale greyish brown; fringe with a pale yellow basal line. Legs pale yellow except femora and tibiae of fore- and hindlegs brown ventrally, tarsi brown at middle of first tarsomeres and at base of remaining tarsomeres.

Male genitalia (Fig. 22). Uncus wide at base, narrowed to middle, distal half clubbed. Gnathos with basal plate roundly produced posteriorly; mesial process short, wide at base, distinctly narrowed to distal 1/3, thereafter slender to pointed apex, curved ventrad before apex. Valva broad basally, narrowed before cucullus; cucullus about 4/5 length of valva, almost tubular, gently arched and extending obliquely dorsad distally, ventral margin convex at proximal base and gently concave beyond; costa with a large digitate process subbasally; sacculus shortly banded, arched inward ventrally. Vinculum narrow, obtuse on anterior margin. Juxta subtrapezoidal, roundly produced anteriorly on lateral margin, anterior margin nearly straight; with a semiovate flap along longitudinal midline from about anterior 2/5 exceeding anterior margin; posterolateral lobe cat-ear-shaped. Aedeagus slightly shorter than valva, gently arched, stout, narrowed from basal 1/4 to obtuse apex, apex with a small subovate dorsal process; with granules in vesica; cornutus absent.

Female genitalia (Fig.39).Eighth abdominal sternite deeply concave in U shape on posterior margin, forming two subtriangular lateral lobes.Apophyses posteriores about twice length of apophyses anteriores. Antrum membranous, funnel-shaped. Ductus bursae coiled, with conic spines running from posterior 1/5 to anterior 1/4; ductus seminalis much slender, arising from about posterior 1/10 of ductus bursae, with dense granules on inner wall. Corpus bursae small, subrounded; signum situated at middle, fusiform, about 3/5 width of corpus bursae, denticulate, serrate along anterior and posterior margins, with a narrow, transverse central groove.

Distribution. China (Yunnan).

Etymology. The specific epithet is derived from the Latin costatus and prolatus, referring to the costa of the valva having a large process in the male genitalia.