Nemophora albiantennella, Issiki, 1930

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 : 17-18

3.1 Nemophora albiantennella species group

Diagnosis. This species group can be distinguished by the following characters: the forewing color is uniform without fasciae, usually yellowish green, bronze, or copper with bright metallic luster; the completely fused base of valva; the suspensorium is very short, not reaching the base of valva; and the apex of aedeagus consists of dorsal and ventral lobes.

Remarks. Three species belong to the albiantennella species group. Among them, N. insulariella is distributed in Sakhalin, Russia ( Kozlov 1997a), and N. albiantennella is a widespread species from northern China to the Russian Far East. In addition, N. pseudalbiantennella sp. nov. is a new and endemic species in Shaanxi Province, China.

Key to species of the albiantennella group based on external morphology

1 Tibiae of leg yellowish to brown; abdomen uniformly brown to dark brown.......................... N. albiantennella

- Tibiae of leg black; abdomen most yellowish to brown with black apex.................. N. pseudalbiantennella sp. nov.

Key to species of the albiantennella group based on male genitalia

1 Valva triangular, with straight lateral margins; suspensorium very small, distinctly far away from posterior margin of vinculum............................................................................... N. albiantennella

- Valva nearly trapezoid, lateral margins concave basally; suspensorium relatively large, close to posterior margin of vinculum........................................................................... N. pseudalbiantennella sp. nov.