affinis, Callichthys Günther [A.] 1864:226 [Catalogue of the fishes in the British Museum v. 5; ref. 1974] Rio Grande [Rio Grande do Sul], Brazil. Syntypes: BMNH 1861.5.7.1-4 (4). Type catalog: Ferraris 2007:111 [ref. 29155]. •Synonym of Callichthys callichthys (Linnaeus 1758) -- (Reis in Reis et al. 2003:293 [ref. 27061], Ferraris 2007:111 [ref. 29155], Litz & Koerber 2014:22 [ref. 33622], Mirande & Koerber 2015:39 [ref. 35117], Koerber et al. 2017:55 [ref. 35267]). Current status: Synonym of Callichthys callichthys (Linnaeus 1758). Callichthyidae: Callichthyinae. Habitat: freshwater.