melanogaster, Acheilognathus Bleeker [P.] 1860:92, Pl. 2 (fig. 1) [Acta Societatis Regiae Scientiarum Indo-Neêrlandicae v. 8 (art. 1); ref. 374] Tokyo, Japan. Lectotype: BMNH 1866.5.2.81. One type not found at RMNH; lectotype selected by Arai & Akai 1988:205 [ref. 1988]. •Synonym of Acheilognathus lanceolatus (Temminck & Schlegel 1846) -- (Okada 1961:384 [ref. 6363]). •Valid as Acheilognathus melanogaster Bleeker 1860 -- (Arai & Akai 1988:199 [ref. 6999], Kawanabe & Mizuno 1989:371 [ref. 25598], Watanabe 1998:262 [ref. 23491], Nakabo 2000:257 [ref. 25086], Matsuura et al. 2000:47 [ref. 26000], Nakabo 2002:257 [ref. 26001], Hagiwara 2003:36 [ref. 27188], Arai et al. 2007:24 [ref. 29106], Yang et al. 2011:163 [ref. 31154], Nguyen et al. 2013:20 [ref. 32689]). Current status: Valid as Acheilognathus melanogaster Bleeker 1860. Acheilognathidae. Distribution: Eastern Honshu, Japan. Habitat: freshwater, brackish.