The genus Lecithocera (Lepidoptera: Lecithoceridae) from China, with descriptions of twenty-one new species Author Yu, Shuai ED27A3A5-C89F-4341-83F1-8141A0D980C4 College of Life Sciences, Nankai University, Tianjin 300071, P. R. China. & College of Life Sciences, Liaocheng University, Liaocheng 252000, P. R. China. yushuai088@163.com Author Wang, Shuxia 648D6695-A0B9-483C-8C19-61F81EB5238D College of Life Sciences, Nankai University, Tianjin 300071, P. R. China. shxwang@nankai.edu.cn text European Journal of Taxonomy 2024 2024-02-29 924 1 74 https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2447/10847 journal article 10.5852/ejt.2024.924.2447 2118-9773 10803382 C06B6616-6766-4A9E-9FE8-8463FB56449C Lecithocera bicornuta sp. nov. urn:lsid:zoobank.org:act: F662643C-DC9C-41D8-A596-C86A18765728 Figs 1F , 6D , 10F , 15F Diagnosis The new species is superficially similar to L. yoshiyasui Park, 2006 . In the male genitalia it can be distinguished by the cucullus with distinctly narrow rounded apex which is longer than half the length of the valva, and the saccus not developed, with a rounded anterior margin; in L. yoshiyasui , the cucullus is slightly narrowed to broadly rounded apex and it is half the length of valva; the saccus is triangular ( Park 2006a: 101 , fig. 6). Etymology The specific epithet is derived from the Latin “ bi -” and “ cornuti ”, referring to the aedeagus with two cornuti in the male genitalia. Type material Holotype CHINA – Yunnan Province • ♂ ; Xishuangbanna , Lvshilin ; 21º51′ N , 101º25′ E ; 20 May 2015 ; Z.G. Zhang leg.; slide no. YS19614 ; NKU . Paratypes ( 33 ♂♂ ) CHINA – Yunnan Province • 28 ♂♂ ; same collection data as for holotype except 20 May‒4 Jun. 2015 ; NKU • 1 ♂ ; Jinghong City , Yexianggu ; 762 m a.s.l. ; 26 Jul. 2014 ; K.J. Teng et al. leg.; slide no. YS19610 ; NKU • 3 ♂♂ ; Jinghong City , Yexianggu ; 762 m a.s.l. ; 9–13 Jul. 2015 ; K.J. Teng and X. Bai leg.; NKU • 1 ♂ ; Jinghong City , Yexianggu ; 762 m a.s.l. ; 9 Aug. 2016 ; K.J. Teng et al . leg.; NKU . Description ADULT ( Figs 1F , 6D ). Wingspan 12.0‒13.0 mm. Head orange white. Antenna orange white; flagellum ringed with dark brown. Labial palpus with second palpomere orange white on inner surface, yellowish brown on outer surface, roughly scaled ventroapically; third palpomere orange white dorsally, dark brown ventrally, shorter than second palpomere. Thorax and tegula orange white. Forewing with costal margin nearly straight except extending ventrad from distal 1/5, apex triangularly produced, termen obliquely truncate; ground colour orange white, with scattered dark brown scales; markings blackish brown: basal streak slender, about ¼ as long as costal margin; discal stigma rounded; discocellular stigma larger, elliptical; tornal streak oblique inward, extended to below discocellular stigma anteriorly; fringe pale brownish yellow; R 3 , R 4 and R 5 stalked, R 5 to termen, M 2 and M 3 free, CuA 1 and CuA 2 short-stalked. Hindwing and fringe pale greyish brown; fringe with pale yellow basal line; M 3 and CuA 1 coincident. MALE GENITALIA ( Fig. 10F ). Uncus subtriangular, concave in broad V-shape on posterior margin; caudal lobe short digitiform, setose and rounded apically. Gnathos with basal plate triangularly produced on posterior margin; median process wide at base, narrowed to distal ⅓, then slender to pointed apex, curved ventrad preapically. Valva broad and parallel-sided basally, narrowed to cucullus; cucullus longer than half length of valva, parallel-sided in basal 2/5, thereafter narrowed to narrowly rounded apex, shallowly concave medially on costal margin, setose, with row of bullet-shaped setae along ventral margin in basal 2/5; costal bar narrow in basal half, widened from middle toward valva, gently angled at middle; sacculus distinct and taenioid basally. Vinculum broad; saccus not developed, rounded on anterior margin. Juxta shield-shaped, with small notch at middle on posterior margin, projected at middle on anterior margin; posterior lobe semiovate basally, narrow taenioid distally, extending outward. Aedeagus about ¾ length of valva, wide at base, narrowed to basal ¼ where it is curved, then parallel-sided, without dorsal denticle, with dense granules in vesica; cornuti consisting of long bar about ⅔ length of aedeagus, and recurved sclerite at middle. SEVENTH ABDOMINAL STERNITE ( Fig. 15F ). Anterolateral rib bar-shaped, curved gently, not reaching posterior margin of sixth abdominal sternite; posterolateral lobe weakly sclerotized, elongate triangular. Female Unknown. Distribution China ( Yunnan ).