Thecobathra cuneata 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 : 488-489

Thecobathra cuneata Wang , sp. nov.

( Figs 2 , 12 , 24 )

urn:lsid:zoobank.org:act:0B8EA6A4-B0E8-442C-9605-2007D6BDD66A

Type material. CHINA, Guangxi: Holotype ♁, Mt. Dayao (24.14°N, 110.08°E), Jinxiu County, 578 m, 25.VII.2022, leg. H Sun et al., slide No. LHY21706.

Paratype: Guangxi: 1♀, same data as holotype except dated 24.VII.2022, slide No. LHY21668 .

Diagnosis. The new species can be distinguished from its congeners in the male genitalia by the valva with a wedge-shaped basal plate, and in the female genitalia by the lunate lamella postvaginalis, and the posteriorly Vshaped antrum.

Description. Adult ( Fig. 2 ). Wingspan 15.0‒16.0 mm.

Head white, frons with appressed scales. Antenna white; flagellum ringed with yellowish brown dorsally. Labial palpus white, except third palpomere yellowish brown ventrally.

Thorax and tegula white. Forewing white, with scattered dark brown scales; costal margin dark brown in basal 1/4, with a brown dot medially, with a short, dark brown band along distal 1/4; fold with a brown dot at middle; fringe white. Hindwing and fringe white. Legs white; tarsus dark brown at apex of each tarsomere; tibia of hindleg with a black dot at either side terminally.

Male genitalia ( Fig. 12 ). Uncus subtriangular. Socius with basal 3/4 subparallel-sided, narrowed from distal 1/4 to apex, with an apical thorn. Subscaphium narrow, parallel-sided. Ventral plate of gnathos small, slightly widened, sclerotized on anterior margin. Valva narrowed from near base to obtused apex, obtusely produced near base on ventral margin; dorsoproximal process large, subquadrate; inner process small, triangular, with ridge extending from its outer corner of base to middle of costa; basal plate wedge-shaped, gradually narrowed, extending from base of valva to basal 1/4 above ventral margin; costa band-shaped, concave medially, narrowed distally. Sacculus indistinct. Saccus broadly V-shaped posteriorly, slightly narrowed to rounded apex. Aedeagus about 1.7 times length of saccus, with a row of teeth along distal 3/4.

Female genitalia ( Fig. 24 ). Papillae anales long and narrow, with long setae. Apophyses anteriores about 1/2 length of apophyses posteriors. Ventral arms of apophyses anteriores connected with lamella postvaginalis. Lamella postvaginalis lunate, with long setae. Antrum about 1/4 length of ductus bursae, V-shaped posteriorly. Ductus bursae 1.2 times length of corpus bursae, parallel-sided, posterior 1/3 weakly sclerotized in part. Corpus bursae rounded; signum gradually narrowed to middle length, anterior half almost uniformly slender, lateral flange horn-shaped.

Distribution. China (Guangxi).

Etymology. The specific epithet is derived from the Latin cuneatus, referring to the wedge-shaped basal plate of the valva.

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.

FIGURES 22–26. Female genitalia of Thecobathra spp. 22, T. acrivalvata, slide No. LHY21217; 23, T. albana, slide No. LHY21265; 24, T. cuneata sp. nov., paratype, slide No. LHY21668; 25, T. lambda, slide No. LHY21678; 26, T. latibasis, slide No. LHY21360. Scales = 0.5 mm.