exaratus, Callichthys Müller [J.] & Troschel [F. H.] 1849:630 [Reisen in Britisch-Guiana; ref. 3072] Guyana. Syntypes: ?ZMB 3150 (1). Type catalog: Ferraris 2007:129 [ref. 29155]. •Synonym of Megalechis personata (Ranzani 1841) -- (Reis 1997:313 [ref. 22747], Reis in Reis et al. 2003:305 [ref. 27061]). •Synonym of Megalechis thoracata (Valenciennes 1840) -- (Reis et al. 2005:678 [ref. 28320], Ferraris 2007:129 [ref. 29155]). Current status: Synonym of Megalechis thoracata (Valenciennes 1840). Callichthyidae: Callichthyinae. Habitat: freshwater.