(83) Nemophora sapporensis Matsumura, 1931

Nemotois sapporensis Matsumura, 1931: 1113, fig. 2341 (TL: Japan, Hokkaido, Sapporo; SEHU)

Nemophora sapporensis: Hirowatari 2013: 108, fig. 3-09-13,14,15,16,17,18,19 (Japan); Umetsu 2014: 6 (Japan, Akita Prefecture).

Nemophora montana Okano, 1957: 64, pl. 1, figs. 5, 6 (TL: Japan, Honshu, Hachimantai, Ôage-numam)

Nemophora japonica (nec. Stringer): Sun et al. 2022, figs. 13, 36 (review).

Diagnosis. This species can be distinguished by the forewing lacking a black speckle, the tegumen having a distinct median ridge, and the phallus having neither a belt of short spines nor a process (Sun et al. 2022).

Specimens examined. Holotype in BEHU and some Japanese specimens in OPU and ELKU were examined. Specimens from China were not available in this study.

Distribution. China (Guangxi, Henan, Shaanxi); Japan, Russia.

Remarks. Sun et al. (2022) recorded this species, as N. japonica, for the first time in China and redescribed its adult and male genitalia. Nemphora japonica is treated as a synonym of N. staudingerella in the present study (see the remarks section of N. staudingerella). Hirowatari (2013) indicated some variations of wing markings and male genitalia of N. staudingerella and N. sapporensis in Japan.