affinis, Silurus (Callichrus) Swainson [W.] 1839:306 [The natural history and classification v. 2; ref. 4303] Type catalog: Ferraris 2007:374 [ref. 29155]. Based on Ham., 152 (duda) -- which is Hamilton 1822:152 [ref. 2031]. Unneeded new name for Silurus duda Hamilton 1822. •Genus Ompok -- (see Kottelat & Lim 1996:240 [ref. 23210]). •Species inquirenda in Ompok -- (Ferraris 2007:374 [ref. 29155]). •Synonym of Ompok bimaculatus (Bloch 1794) -- (Kottelat 2013:235 [ref. 32989]). Current status: Synonym of Ompok bimaculatus (Bloch 1794). Siluridae. Habitat: freshwater.