Lefua Herzenstein [S. M.] 1888:3 Fem. Octonema pleskei Herzenstein 1888. Type by being a replacement name. Replacement for Octonema Herzenstein 1887, preoccupied by Octonema Martens 1868 in fishes and by Octonema Haecker 1879 in Coelenterata. Also appeared in Herzenstein 1888:91 [ref. 2148]. •Synonym of Oreonectes Günther 1868 -- (Bănărescu & Nalbant 1968:339 [ref. 6554], Bănărescu & Nalbant 1995:454 [ref. 23187] but a valid subgenus Lefua). •Valid as Lefua Herzenstein 1888 -- (Sawada 1982:202 [ref. 14111], Sawada in Masuda et al. 1984:59 [ref. 6441], Zhu 1989:20 [ref. 17744], Kottelat 1990:19 [ref. 14137], Bogutskaya & Naseka 1996:48 [ref. 22798], Vasil'eva 1998:96 [ref. 23591], Naseka & Bogutskaya 2004:284 [ref. 27838] dated 1887, Bogutskaya & Naseka 2004:114 [ref. 28183], Mihara et al. 2005:157 [ref. 28201], Prokofiev 2010:889 [ref. 31096], Kottelat 2012:87 [ref. 32367], Parin et al. 2014:103 [ref. 33547], Zhang et al. 2016:129 [ref. 34477], Dyldin & Orlov 2016:670 [ref. 34853], Prokofiev 2017:142 [ref. 35630], Hosoya et al. 2018:193 [ref. 36197], Ito et al. 2019:[1] [ref. 36659], Du et al. 2021:5 [ref. 38600], Luo et al. 2023:695 [ref. 40042], Du et al. 2023:10 [ref. 40265], Katayama & Sawada 2024:247 [ref. 41607]). Current status: Valid as Lefua Herzenstein 1888. Nemacheilidae.