Thecobathra magnidentalis Wang, sp. nov.

(Figs 4, 14)

urn:lsid:zoobank.org:act: 71A1CD0D-1C3D-416C-B122-164B87E1CCA8

Type material. CHINA, Yunnan: Holotype ♁, Mt. Luoluoxinzhai, 1500 m, 22.X.2000, leg. WJ Bu, slide No. YHL00384.

Paratype: Yunnan: 1♁, Taiyanghe National Forest Park (22.68°N, 101.03°E), Pu’er, 1450 m, leg. KJ Teng, slide No. LHY21688 .

Diagnosis. The new species is similar to T. acropercna Meyrick, 1922 . It can be distinguished in the male genitalia by the triangular sacculus, the absence of a juxta, and the aedeagus with two large teeth near the base. In T. acropercna, the sacculus is indistinct, the juxta is present, and the aedeagus bears one large tooth near the base (Moriuti 1971: 233, fig. 1).

Description. Adult (Fig. 4). Wingspan 16.5 mm.

Head white, with appressed scales on frons. Antenna with scape pale yellow; flagellum white, ringed with yellow. Labial palpus pale yellow.

Thorax white. Forewing white, with dark brown scales; costal margin dark brown from base to basal 1/4, yellowish brown from 1/2 to distal 1/6; brown stripe oblique upward from middle of dorsum to fold; brown speckle formed by dense brown scales diffused from distal 1/4 of dorsum to tornus, reaching fold anteriorly; fringe ochreous yellow. Hindwing pale grey, tinged with pale yellow, darkened distally; fringe white at base of costal margin and dorsum, grey around apex and along termen. Legs white, with dark brown scales; spurs and tarsi mixed with yellowish brown; hind tibia terminally with a black dot on outer surface.

Male genitalia (Fig. 14). Uncus produced posteromedially. Socius relatively short, extending obliquely outward, with a thorn at apex. Subscaphium slender, narrowed anteriorly. Ventral plate of gnathos small, tongue-shaped, weakly sclerotized. Valva wide at base, narrowed to obtusely rounded apex; costa narrow, banded, convex near base; dorsoproximal process quadrate; inner process elongate, gradually narrowed toward tip; basal plate triangular, extending from inner corner of dorsoproximal process to below basal 1/6 of costa. Sacculus small, triangular. Saccus with posterior 1/3 V-shaped, anterior 2/3 rod-shaped, slightly narrowed to obtusely rounded apex. Aedeagus 1.2 times length of saccus, with two large teeth near base, with a row of many small teeth from beyond second large teeth to apex.

Female unknown.

Distribution. China (Yunnan).

Etymology. The specific name is derived from the Latin magni - and dentalis, referring to the two large teeth near the base of the aedeagus.