Thecobathra odontoidea 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 : 497-498

Thecobathra odontoidea Wang , sp. nov.

( Figs 7 , 18 )

urn:lsid:zoobank.org:act:5690DEC8-9E0A-4C90-90AF-282744FD8FC2

Type material. CHINA, Xizang: Holotype ♁, Beibeng Town (29.25°N, 95.18°E), Motuo County, 810 m, 13.VIII.2017, leg. MJ Qi & XF Yang, slide No. LHY21068.

Paratypes: Xizang: 3♁, same data as holotype except dated 12‒14.VIII.2017, slide Nos. LHY21049, LHY21056, LHY21071; 2♁, Gelin Village (29.25°N, 95.19°E), Beibeng Town , Motuo County, 1063 m, 29.VII.2018, leg. MJ Qi, slide Nos. LHY21076, LHY21087; 4♁, Motuo County (29.33°N, 95.33°E), 1016 m, 4.VIII.2018, leg. MJ Qi, slide Nos. LHY21077, LHY21078, LHY21088, LHY21090 .

Diagnosis. The new species can be distinguished from its congeners in the male genitalia by the uncus with a pair of longitudinal medial flanges, the socius with a stout process on the inner margin, and the large, rounded ventral plate of the gnathos.

Description. Adult ( Fig. 7 ). Wingspan 11.5‒13.0 mm.

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

Thorax and tegula white. Forewing white, with dark brown scales; costal margin with basal 1/5 dark brown, distal 1/4 brown; black stripe oblique outward from middle of dorsum to distal 1/3 of fold; fringe white, with a pale grey basal line around apex and along termen, distal 1/3 dark brown. Hindwing white basally, greyish distally; fringe white. Legs white; tarsi yellow, dark brown at apices; spurs yellow; tibia of hindleg terminally with a dark brown dot at each side, surrounded by yellowish brown.

Male genitalia ( Fig. 18 ). Uncus slightly produced, bifid, with a flange along each side of incision. Socius oblique outward, parallel-sided basally, narrowed from distal 1/4 to pointed apex, with a heavily sclerotized odontoid process at distal 1/3 on inner margin. Subscaphium widened anteriorly, with a sclerotized medial ring longitudinally. Ventral plate of gnathos subrounded, with a short transverse ridge at middle posteriorly; anterior margin produced medially, forming a mastoid process. Valva with basal half narrow and parallel-sided, distal half slightly dilated, apex obtuse; dorsoproximal process subrounded; inner process narrowly elongate, with a ridge extending from its outer corner of base to middle of valva; another dentate ridge from near base to middle half of valva, first below preceding ridge, then joined with it. Sacculus indistinct. Saccus with posterior 2/5 U-shaped, anterior 3/5 narrowed to apex. Aedeagus slender, with two rows of dentations: one row running from middle to apex, the other from distal 1/3 to apex.

Female unknown.

Distribution. China (Xizang).

Etymology. The specific epithet is derived from the Latin odontoideus, referring to the odontoid process on the inner margin of the socius.

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 15–18. Male genitalia of Thecobathra spp. 15, T. meniscata sp. nov., holotype, slide No. LHY21528; 16, T. microsignata, slide No. LHY21734; 17, T. minutiprocessa sp. nov., holotype, slide No. LHY21667; 18, T. odontoidea sp. nov., holotype, slide No. LHY21068. Scales = 0.5 mm.