A taxonomic review of Thiotricha Meyrick, 1886 (Lepidoptera, Gelechiidae, Thiotrichinae) from China, with descriptions of 84 new species Author Lee, Ga-Eun 0000-0002-5774-5850 College of Life Sciences, Nankai University, Tianjin 300071, China gaeunlee 486 @ gmail. com; https: // orcid. org / 0000 - 0002 - 5774 - 5850 & Research Institute for Basic Sciences, Jeju National University, Jeju 63243, Korea Corresponding author: lihouhun @ nankai. edu. cn; https: // orcid. org / 0000 - 0002 - 8953 - 3422 gaeunlee486@gmail.com Author Li, Houhun 0000-0002-5774-5850 College of Life Sciences, Nankai University, Tianjin 300071, China gaeunlee 486 @ gmail. com; https: // orcid. org / 0000 - 0002 - 5774 - 5850 & College of Life and Geographic Sciences, Kashi University, Kashi 844000, China; Xinjiang Key Laboratory of Biological Resources and Ecology of Pamirs Plateau, Kashi 844000, China gaeunlee486@gmail.com text Zootaxa 2024 2024-05-15 5449 1 1 222 http://dx.doi.org/10.11646/zootaxa.5449.1.1 journal article 10.11646/zootaxa.5449.1.1 1175-5334 11233121 CAC513A2-D2B4-4E6E-BAB6-CCE6E054680F Thiotricha peniticoncava sp. nov. ( Figs 10A , 24L , 34B , 51D ) Type material. Holotype ♂ , CHINA, Yunnan Province , Tengchong City , Linjiapu ( 25.29°N , 98.70°E ), 2144 m , 14.viii.2014 , leg. Kaijian Teng , Shurong Liu and Hua Rong , genitalia slide no. LGE18495 . Paratypes . CHINA : Yunnan Province : 2 ♂♂ , 2 ♀♀ , same data as holotype except 12−15.viii.2014 , genitalia slide nos. LGE18496f, LGE 18504m ; 2 ♀♀ , Mt. Ailao , 2476 m , Jingdong County , 2.vii.2013 , leg. Shurong Liu , Yuqi Wang and Kaijian Teng. FIGURE 10. Adults of Thiotricha spp. A , T. peniticoncava sp. nov. , ♂, holotype; B, T. brevissima sp. nov. , ♂, holotype; C, T. confluens sp. nov. , ♂, holotype; D, T. rosatorna sp. nov. , ♀, paratype; E, T. cochlearis sp. nov. , ♂, holotype; F, T. albimaculata sp. nov. , ♂, holotype; G, T. rufimarginata sp. nov. , ♂, holotype; H, T. deltaloba sp. nov. , ♂, holotype. Diagnosis. The species can be diagnosed by the light yellowish forewing with basal 1/2 broadly fuscous from costa to fold. A dark costal band is absent in the species whereas it is present in most members of the pontifera - group. The male genitalia are similar to those of T. crassiflagella , but can be distinguished from the latter by the following characters: narrower valva with distal 1/3 slightly curved outward, very slender uncus and the aedeagus bearing a short projection near apex. The female genitalia of T. peniticoncava also resemble those of the latter species, but a short sclerite placed at the base of ductus bursae is absent in the former. Description. Adult ( Fig. 10A ). Wingspan 8.5−9.0 mm. Head cream to light yellow. Labial palpus cream to light yellow; segment III as long as II, strongly or weakly suffused with dark fuscous on ventral surface. Antenna with scape light yellow, slightly mixed with fuscous on posterior margin; flagellum dark fuscous except basal 1/2 or 1/3 of dorsal surface light yellow, male cilia as long as diameter. Thorax light yellow, with a fuscous median line. Tegula light yellow except anterior margin dark fuscous. Forewing ground color light yellow, rarely golden ochre, basal 1/2 broadly fuscous from costa to fold, anterior edge of costa dark fuscous to black in basal 1/2 or 1/3; apical area usually dark, apical spot bordered inwardly by white scales; markings fuscous: a costal streak running from distal 1/4, sometimes broadened at costa, nearly reaching apical spot posteriorly, bordered outwardly by white scales; beyond this, a narrower costal streak from distal 1/5, confluent with former costal streak posteriorly; often basally ill-defined, an oblique streak from between basal 1/3 and 1/2 of dorsum, running shortly toward base in parallel with fold, then strongly curved outward toward apex, broadened at fold and narrowed beyond fold, confluent with costal streaks distally; an inwardly directed, V-shaped marking on fold near tornus, confluent with costal streaks anteriorly; an indistinct tornal streak reaching former V-shaped marking anteriorly, bordered inwardly by white scales; fringe on costa, termen and dorsum dark fuscous, usually mixed with light ochre on termen and dorsum. Hindwing dark fuscous, fringe dark fuscous except apical area white with a terminal black band. Legs as in T. digitiprojecta except ground color dirty-white to light yellow. Male sternum VIII ( Fig. 24L ). Approximately 1/6 length of abdomen, posterior margin deeply concave. Male genitalia ( Fig. 34B ). Uncus tongue-shaped, setose distally. Gnathos hook long and simple. Tegumen 3 times as long as uncus. Valva narrow, almost uniformly elongate after base, slightly curved outward at distal 1/3, rounded apically. Anellus lobe slender, 1/4 length of valva, distal 1/2 constricted; apical bristle as long as anellus lobe, strongly hooked. Juxta with a triangular process in basal 1/2 of inner margin. Vinculum with posterior margin produced medially. Saccus subtriangular or narrowly elongate, not exceeding tegumen pedunculus. Aedeagus with basal 3/5 globular, slender and straight distally, a short projection before apex. Female genitalia ( Fig. 51D ). Papillae anales moderately sclerotized. Apophyses anteriores slightly longer than 1/2 length of apophyses posteriores. Tergum VIII deeply concave posteriorly. Sternum VIII longer than tergum VIII, posterior 2/3 with an elongate-ovate sclerotization above ostium bursae, anterior margin produced in U-shape. Ostium bursae opening at posterior 2/3 of sternum VIII. Ductus bursae slender at base, gradually broadening to corpus bursae, somewhat bulged near entrance of corpus bursae; ductus seminalis arising from posterior 1/8. Corpus bursae elongate-ovate, 1/2 length of ductus bursae, without signum. Distribution. China ( Yunnan ). Etymology. The species name is derived from Latin, penitus (deeply) and concavus (concave), referring to the deeply concave posterior apex of the male abdominal segment VIII.