Torodora dentisaccula Yu et Wang, 2022

Yu, Shuai, Zhu, Yanmei & Wang, Shuxia, 2022, Eighteen new species and fifteen new records of the genus Torodora Meyrick (Lepidoptera: Lecithoceridae) from China, Zootaxa 5133 (1), pp. 1-39 : 7

Torodora dentisaccula Yu et Wang , sp. nov.

( Figs 5 , 23 , 40 )

Type material. CHINA, Xizang [Tibet]: Holotype ♂, Motuo County (29°40′N, 95°30′E), 2089 m, 19.VIII.2017, leg. MJ Qi & XF Yang, slide No. YS 20391 . Paratypes: 5♀, same data as holotype, slide No. YS 20392 .

Diagnosis. This new species can be distinguished from its congeners by the reduced gnathos with the subrounded basal plate deeply concave in V shape on the posterior margin and the absence of the mesial process, and the uniformly banded sacculus denticulate basally.

Description. Adult ( Fig. 5 ). Wingspan 14.0‒15.0 mm.

Head brown. Antenna pale yellow, flagellum shortly ciliate ventrally in male. Labial palpus brown except pale yellow at apex of second palpomere and at base of third palpomere, third palpomere as long as second palpomere.

Thorax and tegula dark brown. Forewing with costal margin slightly arched, apex produced, termen shallowly concave; ground color dark brown, mixed with orange white scales; costal spot pale orange, small, at distal 1/6; discal stigma black, large, elliptical, reaching anterior margin of discal cell, reaching fold posteriorly; discocellular stigmata black, doubled; subterminal line pale yellow, running from costal spot to distal 1/6 of dorsum, slightly arched outward medially; fringe pale orange except brown around apex and tornus, with a brown subbasal band. Hindwing pale grey; fringe pale yellowish brown, basal line pale yellow. Legs with femora and tibiae brown except pale yellow on entire mid tibia and dorsal surface of hind tibia, tarsi pale yellow except dark brown dorsally at middle of first tarsomere and at base of remaining tarsomeres.

Male genitalia ( Fig. 23 ). Uncus wide at base, narrowed to before middle, thereafter elliptically dilated. Gnathos with basal plate subrounded, deeply concave in V shape on posterior margin; mesial process absent. Valva wide at base, narrowed to cucullus; cucullus widened to obtuse apex; costa straight basally, deeply concave at distal 3/5, triangularly produced in distal 2/5; sacculus uniformly banded, straight ventrally, denticulate basally. Vinculum narrow, obtusely rounded on anterior margin. Juxta large, subrectangular, shallowly concave and heavily sclerotized on posterior margin, obtusely produced at middle on anterior margin, with a banded flap along posterior margin on dorsal surface; posterolateral lobe elongate triangular, about half length of juxta. Aedeagus slightly shorter than valva, arched, wide at base, tapered to apex, with dense granules in vesica; cornutus heavily sclerotized, banded, denticulate basally, about half length aedeagus.

Female genitalia ( Fig. 40 ). Eighth abdominal sternite divided into two lateral plates by a longitudinal median incision.Apophyses posteriores slightly longer than 1.5 times length of apophyses anteriores. Antrum membranous. Ductus bursae about twice length of corpus bursae, with sparse conic spines medially; ductus seminalis narrower than ductus bursae, helical, arising from about posterior 1/5 of ductus bursae. Corpus bursae oblong; signum situated posteriorly, elliptical, rolled, densely denticulate.

Distribution. China (Xizang [Tibet]).

Etymology. The specific epithet is derived from the Latin dent- and sacculus, referring to the basally denticulate sacculus in the male genitalia.

Figures

FIGURES 1‒6. Adults of Torodora spp. (dorsal view). 1. T. acuminata sp. nov., paratype, female, slide No. YS20263; 2. T. atomata sp. nov., holotype, male, slide No. ZYM06217; 3. T. canaliculata sp. nov., holotype, male, slide No. YS20133; 4. T. costatiprolata sp. nov., holotype, male, slide No. YS20140; 5. T. dentisaccula sp. nov., holotype, male, slide No. YS20391; 6. T. gemella sp. nov., paratype, male, slide No. LSR12149. Scale bars = 2.0 mm.

FIGURES 19‒24. Male genitalia of Torodora spp. 19. T. acuminata sp. nov., holotype, slide No. YS20034; 20. T. atomata sp. nov., holotype, slide No. ZYM06217; 21. T. canaliculata sp. nov., holotype, slide No. YS20133; 22. T. costatiprolata sp. nov., holotype, slide No. YS20140; 23. T. dentisaccula sp. nov., holotype, slide No. YS20391; 24. T. gemella sp. nov., paratype, slide No. YS20178. Scale bars = 0.5 mm.

FIGURES 37‒40. Female genitalia of Torodora spp. 37. T. acuminata sp. nov., slide No. YS20263; 38. T. canaliculata sp. nov., slide No. YS19665; 39. T. costatiprolata sp. nov., slide No. YS20318; 40. T. dentisaccula sp. nov., slide No. YS20392. All paratypes. Scale bars = 0.5 mm.