Nemophora arcuatifasciata 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 : 37

(35) Nemophora arcuatifasciata Liao, Hirowatari & Huang , sp. nov.

(Plates IV-5, XXIV-1)

LSID urn:lsid:zoobank.org:act:3FABFDC9-7D91-4AB6-B861-DD25DBBD3AF7

Diagnosis. This species is very similar to some species of this group, such as N. decisella , N. paradisea , and N. smaragdaspis , but can be distinguished by the following characters in female: the distal part of flagellum uniform yellow, while black and white in N. decisella and silvery white to light bronzy in N. paradisea and N. smaragdaspis ; the color of the basal part is slightly lighter than forewing ground, but most yellow in the others which distinctly differs from forewing ground; the transverse central fascia is narrow, obviously arcuate outward at the middle, which slightly forms “3”-shaped, while broad with almost straight margins in the others.

Description. Female. Forewing about 9.0 mm; wing expanse about 18.4 mm.

Vertex densely covered with yellow to brownish hairs; face with dark brown scales and hairs. Eyes small, far away to each other dorsally; eye size index about 0.65. Labial palpus long, densely covered with dark brown hairs; galeae with brown scales laterally. Antenna slightly longer than forewing length, more than 10.2 mm; basal 2/3 covered with long scales forming a dense, tubular brush, generally brown to dark brown mixed with some black internally except apical part with long black scales dorsally; diameter of this brush approximately equal to vertical eye diameter; remaning distal part of flagellum slender, uniform yellow. Legs black with purple metallic luster, except tarsi dark brown. Thoracic dorsum and tegula dark brown to black, with brass metallic luster. Forewing lanceolate, relatively broad, length about 2.8 × width; ground color dark brown to black with blight purple metallic luster, except basal part near costal margin light color; a transverse dark brown fascia placed at basal 2/5 and bordered with a pair of narrow black-margined silvery-leaden bands on both sides, obviously arcuate outward at middle, slightly “3”-shaped; disc of apical area scattered with numerous scales shining bright silver gray luster; apical angle area with a small patch of dark yellow to brownish spot; cilia dark brownish red to black with purple metallic luster; vein R 3 and R 4 separated. Hindwing and cilia dark brown to black, margins obvious darker color; vein Rs stalked with M 1 at basal 1/5. Abdomen dark brown dorsally and black ventrally.

Male. Unknown.

Female genitalia. Apophyses posteriores and anteriores long and slender. Vestibulum membranous, except internal and dorsal part weakly sclerotized lamella. Bursa copulatrix short, slender, membranous.

Holotype. [Hunan] ♀, Mt. Tianpingshan, Badagongshan National Nature Reserve , Sangzhi County, Zhangjiajie City, 2021.V.1–2, C.Q. Liao leg. ( HUNAU).

Paratype. [Jiangxi] 1♀, Wuyishan National Nature Reserve , Qianshan County, Shangrao City, 2008.XI.22–25, L.S. Chen leg. ( HUNAU) .

Etymology. The specific epithet is derived from the words arcuate and fascia, referring to its forewing with the arcuate transverse central fascia.

Distribution. China (Hunan, Jiangxi).

Remarks. This species occurs in May and November.