Thiotricha parvunca Lee & Li 2024, sp. nov.
Creators: name: Lee, Ga-Eun
name: Li, Houhun
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Gelechiidae
Thiotricha
Thiotricha parvunca

description: Thiotricha parvunca sp. nov.   
(Figs 7D, 23K, 30E, 48C)  
 Type material. Holotype ♂, CHINA, Sichuan Province, Chengdu City, Anzihe Nature Reserves, Shaoyaogou Conservation Station (30.78°N, 103.2°E), 1598 m, 20.vi.2016, leg. Kaijian Teng and Xiaofei Yang, genitalia slide no. LGE16279. Paratype. CHINA: Sichuan Province: 1 ♀, Caoping Town (30.95°N, 103.32°E), 1557 m, Sanjiang Town, Wenchuan County, 11.vii.2014, leg. Wei Guan, Kaijian Teng, Wei Guan, Xiuchun Wang and Shurong Liu, genitalia slide no. LGE18166.   
 Diagnosis. The new species resembles very closely T. eborinicosta, but the former is much larger in size. Also, the forewing markings are light ochre in T. parvunca whereas those are creamy white in the latter species. The male genitalia of T. parvunca are very distinctive as the uncus is greatly reduced compared to other congeneric species. The female genitalia are somewhat similar to those of T. attenuata, but the ductus bursae is broader and the corpus bursae is longer in the former.   
 Description. Adult (Fig. 7D). Wingspan 13.5 mm. Head light ochre, slightly mixed with fuscous. Labial palpus ochre, mixed with fuscous from apex of segment II to apex of III on ventral surface; segment III 2/3 length of II, pointed at apex. Antenna ochre, suffused with fuscous on posterior margin; flagellum fuscous except base and ventral surface ochre, male cilia as long as diameter. Thorax and tegula dark fuscous. Forewing dark fuscous; anterior edge of costa black at base, from near base to distal 1/3 light ochre, this ochre extends obliquely outward as a costal streak; beyond and parallel to this a short, yellowish white costal streak, slightly tinged basally with light ochre and bordered outwardly by black scales; from before apex to termen a short white costal streak, tinged with light ochre basally, bordered outwardly by apical spot; apical spot small and somewhat indistinct; from outer margin of discal cell a light ochre longitudinal median line extending toward apex; below this a short, light ochre, inwardly oblique streak, nearly meets with median line distally; termen with a light ochre patch, semielliptical, bordered outwardly by a black terminal spot; a short black streak within the patch near terminal spot; fringe fuscous. Hindwing and fringe dark fuscous. Legs light ochre; mid and hind tarsi with first tarsomere fuscous at middle, remaining tarsomeres fuscous basally.   
 Male sternum VIII (Fig. 23K). Broad, gradually narrowed from base, rounded posteriorly.   
 Male genitalia (Fig. 30E). Uncus comparatively small, with long setae; subtriangular in basal 1/2, constricted medially, ovate in distal 1/2. Gnathos hook long, curved apically. Tegumen approximately 4 times as long as uncus, anterior margin deeply concave in U-shape. Valva with base strongly narrowed, gradually widening from base to middle; distal 1/2 broad, spatulate and setose, rounded apically; conjunction between extreme base of valva and juxta strongly elongate and angled, forming a triangular process. Anellus lobe 2/5 length of valva, clavate, slightly curved inward; apical bristle 1/3 length of anellus lobe. Juxta with a subtriangular process basally, sparsely setose medially. Vinculum simple, slender. Saccus broad, tongue-shaped, slightly concave before apex laterally, exceeding tegumen pedunculus. Aedeagus with base dilated, constricted at basal 1/3, gradually narrowed from middle to near apex, dorsal surface with a semicircular extension at middle, rounded apically.   
 Female genitalia (Fig. 48C). Papillae anales weakly sclerotized, sparsely setose. Apophyses anteriores 2/3 length of apophyses posteriores. Tergum VIII short, divided into two sclerites, each sclerite triangular. Sternum VIII broadly concave posteriorly, weakly sclerotized at middle, strongly produced anteriorly in V-shape. Ostium bursae very large, rounded. Ductus bursae slender, broadened at base, then uniformly elongate, a short sclerite situated near base; ductus seminalis arising from posterior 1/4. Corpus bursae elliptical, 1.5 times longer than ductus bursae, with numerous small spines from anterior 1/3 to 4/5; signum large and slender, crescent-shaped, situated in posterior half of corpus bursae.   
 Distribution. China (Sichuan).   
 Etymology. The species name is derived from Latin parvus (small) and uncus (uncus), referring to the small uncus.   
 Remarks. Thiotricha parvunca is Thiotricha sp. 2 in Lee et al. (2021) for the phylogenetic study of Thiotrichinae. The genetic sequences for the species are available from GenBank.
description: Published as part of Lee, Ga-Eun & Li, Houhun, 2024, A taxonomic review of Thiotricha Meyrick, 1886 (Lepidoptera, Gelechiidae, Thiotrichinae) from China, with descriptions of 84 new species, pp. 1-222 in Zootaxa 5449 (1) on pages 29-30, DOI: 10.11646/zootaxa.5449.1.1, http://zenodo.org/record/11233121