echigonia, Lefua Jordan [D. S.] & Richardson [R. E.] 1907:263, Fig. 1 [Proceedings of the United States National Museum v. 33 (no. 1570); ref. 10643] Nagaoka, Echigo, Japan. Holotype: CAS-SU 20164. Paratypes: USNM (1). Type catalog: Böhlke 1953:39 [ref. 12291]. •Synonym of Lefua costata (Kessler 1876), but a valid subspecies -- (Kawanabe & Mizuno 1989:400 [ref. 25598]). •Valid as Lefua echigonia Jordan & Richardson 1907 -- (Kuroda 1953:276 [ref. 39545], Okada 1961:546 [ref. 6363], Sawada in Masuda et al. 1984:59 [ref. 6441], Watanabe 1998:263 [ref. 23491], Nakabo 2000:277 [ref. 25086], Matsuura et al. 2000:168 [ref. 26000], Nakabo 2002:277 [ref. 26001], Mihara et al. 2005:157 [ref. 28201], Kottelat 2012:87 [ref. 32367], Hosoya et al. 2018:199 [ref. 36197], Ito et al. 2019:485 [ref. 36659]). Current status: Valid as Lefua echigonia Jordan & Richardson 1907. Nemacheilidae. Distribution: East Asia: Honshu Island (Japan). Habitat: freshwater.