The medaka was first described as Poecilia latipes by Temminck and Schlegel in 1846 (Siebold's Fauna Japonica, Poiss., P.224, Pl.102, Fig. 5). G殤ther changed it as Haplochilus latipes. Jordan and Snyder (1901) described it as Aplocheilus latipes but later they separated it from Aplocheilus and erected a new genus Oryzias. They regarded Oryzias as having no teeth on vomer while Aplocheilus possesses teeth on it. (after MEDAKA (killifish) : Biology and Strains (ed.) Yamamoto, T. 1975).
Fauna Japonica, Copyright 2000, Kyoto University Library