Thecobathra setulosa 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 : 503

Thecobathra setulosa Wang , sp. nov.

( Figs 10 , 21 )

urn:lsid:zoobank.org:act:8E213624-54CE-4577-B3D8-570EC650965D

Type material. CHINA, Xizang: Holotype ♁, 80K (29.66°N, 95.49°E), Motuo County, 2059 m, 8.VIII.2017, leg. MJ Qi & XF Yang, slide No. LHY21044.

Paratypes: Xizang: 4♁, same data as holotype except dated 6‒19.VIII.2017, slide Nos. LHY21043, LHY21048, LHY21065, LHY21066; 1♁, 80K (29.66°N, 95.49°E), Motuo County, 2076 m, 8.VIII.2018, leg. MJ Qi, slide No. LHY21626 .

Diagnosis. The new species is similar to T. microsignata Liu, 1980 . It can be distinguished by the apically rounded sacculus without sclerotized bands along the dorsal and ventral margins, and the aedeagus with teeth on one side. In T. microsignata , the sacculus is oblique inward apically and has sclerotized bands along both dorsal and ventral margins, and the aedeagus has teeth on both sides.

Description. Adult ( Fig. 10 ). Wingspan 14.0‒15.0 mm.

Head white, with appressed scales on frons. Antenna white; flagellum ringed with yellow dorsally. Labial palpus white, second palpomere mixed with brown scales on outer surface.

Thorax and tegula white. Forewing white; costal margin with basal 1/5 dark brown, distal 1/3 yellowish brown; dark brown band running along dorsum from basal 1/5 to distal 2/5, then oblique upward to fold; yellowish brown speckle formed by dense yellowish brown scales diffused from end of dorsum to beyond end of fold; fringe yellowish brown along costal margin and dorsum, greyish white in basal half, yellowish brown from basal half to 3/4, and dark brown in distal 1/4 along termen. Hindwing pale grey, greyish distally; fringe pale grey, mottled with yellow. Legs white; spurs and tarsi of fore- and midlegs yellowish brown; foreleg dark brown ventrally; tibia of hindleg with black scales at apex, tarsi yellow except first tarsomere yellowish brown dorsally.

Male genitalia ( Fig. 21 ). Uncus triangularly produced, bifid. Socius inflated from near base to 3/5, produced at basal 3/5 on outer margin, then narrowed to apex, with two thorns apically. Subscaphium narrow, parallel-sided. Ventral plate of gnathos long, narrowed anteriorly, deeply concave in V shape on posterior margin, densely setose. Valva slightly narrowed from base to rounded apex; dorsoproximal process gradually narrowed, with a long spine arising from inner margin, curved at base, nearly straight distally; inner process narrow, elongate triangular. Sacculus narrower basally, distal 2/3 wider and subparallel to rounded apex. Saccus with posterior 1/4 U-shaped, anterior 3/4 narrow and subparallel sided, apex rounded. Aedeagus straight, 1.4 times length of saccus, with a row of teeth along distal 5/8; cornuti consisting of two large spines running from distal 1/5 to before apex, two clusters of small spines posterior to two large spines.

Female unknown.

Distribution. China (Xizang).

Etymology. The specific epithet is derived from the Latin setulosus, referring to the setose ventral plate of the gnathos.

Figures

FIGURES 7–10. Adults of Thecobathra spp. 7, T. odontoidea sp. nov., holotype, male, slide No.LHY21068; 8, T. paritetragona sp. nov., holotype, male, slide No. LHY21720; 9, T. pectinacea sp. nov., holotype, male, slide No. LHY21060; 10, T. setulosa sp. nov., holotype, male, slide No. LHY21044. Scales = 2.0 mm.

FIGURES 19–21. Male genitalia of Thecobathra spp. 19, T. paritetragona sp. nov., holotype, slide No. LHY21720; 20, T. pectinacea sp. nov., holotype, slide No. LHY21060; 21, T. setulosa sp. nov., holotype, slide No. LHY21044. Scales = 0.5 mm.