Thecobathra magnidentalis Wang, 2023

Liu, Haoyu & Wang, Shuxia, 2023, Taxonomic study of the genus Thecobathra Meyrick (Lepidoptera: Yponomeutidae) in China, with descriptions of eight new species, Zootaxa 5325 (4), pp. 483-508 : 492

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.

Figures

FIGURES 1–6. Adults of Thecobathra spp. 1, T. albana, male, slide No. LHY21451; 2, T. cuneata sp. nov., paratype, female, slide No. LHY21668; 3, T. lambda, male, slide No. LHY21460; 4, T. magnidentalis sp. nov., holotype, male, slide No. YHL00384; 5, T. meniscata sp. nov., holotype, male, slide No. LHY21528; 6, T. minutiprocessa sp. nov., paratype, female, slide No. JQ10078. Scales = 2.0 mm.

FIGURES 11–14. Male genitalia of Thecobathra spp. 11, T. albana, slide No. LHY21419; 12, T. cuneata sp. nov., holotype, slide No. LHY21706; 13, T. lambda, slide No. LHY21452; 14, T. magnidentalis sp. nov., holotype, slide No. YHL00384. Scales = 0.5 mm.