Nemophora basalistriata Liao, Hirowatari & Huang, 2023

Liao, Cheng-Qing, Hirowatari, Toshiya, Yagi, Sadahisa, Wang, Min, Wang, Xing & Huang, Guo-Hua, 2023, The fauna of the family Adelidae (Insecta, Lepidoptera, Adeloidea) from China, Zootaxa 5348 (1), pp. 1-152 : 30-31

(28) Nemophora basalistriata Liao, Hirowatari & Huang , sp. nov.

(Plates III-2, XIV-2, XXIII-1)

LSID urn:lsid:zoobank.org:act:91EFA659-E601-4EEE-9FCC-0CB5EFED09C3

Diagnosis. This species can be easily distinguished by the triangular yellow spot on the forewing base, by the legs dark brown to black except for the hind femurs yellow, and by the sacculus of valvae slightly expanding in middle but not forming an angular process.

Description. Male. Forewing about 8.6 mm; wing expanse about 18.0 mm.

Head covered with raised reddish-brown hairs; face with light yellow to brownish scales and reddish-brown hairs around eyes. Eyes large, relatively close to each other dorsally; eye size index about 1.6. Labial palpus moderate in length, covered with brownish scales and hairs; galeae with brown to dark brown scales laterally and little black basally. Antenna slender, about 22.3 mm, 2.6 × forewing length; basal 1/5 black and apical part light brown or gray. Legs dark brown to black with purple metallic luster; hind femur yellow, and tibiae with black long hairs. Thoracic dorsum and tegula dark brown to black, with brass metallic luster. Forewing lanceolate, ground color dark brown to black; base with a triangular yellow spot, sometimes exceeding to costal and posterior margins; middle part with a light yellow to pale brown transverse central fascia bordered on both sides by black bands, slightly curved at middle, costal margin slightly wider than posterior margin; disc of apical area with bright blue metallic luster, scattered with numerous yellow to brownish scales; cilia dark brown to black with blue metallic luster; vein R 3 and R 4 separated. Hindwing and cilia dark brown to black; vein Rs stalked with M 1 at basal 1/3. Abdomen dark brown to black with yellow rings on each posterior margin.

Female. Forewing about 7.8 mm, wing expanse about 12.6 mm. Eyes small, eye size index ca. 0.6. Antenna short, about 12.6 mm, ca. 1.6 × forewing length; basal 1/3 stout with thickened scales which reddish brown in basal half and black in apical half; apical 2/3 slender which proximal tens of segments black to brown, and distal segments gray. Others similar to male.

Male genitalia. Uncus triangular, shorter than apex of valvae, with distinct median keel. Vinculum relatively slender, about 3.2 × as long as valva; posterior margin nearly straight. Valva triangular, rounded stout apically; lateral margins nearly straight; sacculus slightly expanded but not forming distinct process, separated at base ventrally; suspensorium nearly quadrate, anterior part far beyond posterior margin of vinculum in ventral view. Transtilla wide medially and slightly narrow laterally; median process long and pointed, with concaved anterior margin. Aedeagus long and slender; basal 2/3 curved dorsally; apical portion with a slender lamellate and a concaved and serratedmargined lobe; vesica with a pair of slender cornuti dorsally. Juxta arrow-shaped; arrow-head relatively pointed, lateral arms long.

Female genitalia. Ovipositor pointed, with some minute teeth ventroposteriorly. Apophyses posteriores and anteriores long and slender, subequal in length. Vestibulum relatively large, membranous; vestibular lamella well developed, nearly reniform in ventral view. Bursa copulatrix relatively long, membranous.

Holotype. [Sichuan] ♁, Longchi (900 m), Dujiangyan City, 2017.VI.14–16, S. G.H. Huang leg. ( HUNAU).

Paratypes. [Sichuan] 1♀, same data as holotype, G.H. Huang & M. Wang leg. ; 1♁, same locality as holotype (950 m), 2016.VI.27, G.H. Huang leg. ; 2♀, Longcanggou, Yingjing County, Ya’an City , 2017.VII.17–18, M. Wang leg. ; 1♁, same locality (1,400 m), 2015.VIII.10–11, G.H. Huang leg. ; 1♁, same locality, 2016.VII.1, T.T. Yu leg. ; [Jiangxi] 5♁, Matoushan National Nature Reserve, Zixi County, Fuzhou City , 2020.VII.12, C.P. Long leg. ( HUNAU) .

Etymology. The specific epithet is derived from the words basal and stria, referring to the triangular basal stria at the base of the forewing.

Distribution. China (Sichuan, Jiangxi).

Remarks. This species is distributed in South China and occurs from June to July.

One DNA barcode of N. basalistriata sp. nov. is generated, and this sequence is closest to N. conjugata sp. nov. (pairwise distances: 0.064).