pictus, Callichthys Müller [J.] & Troschel [F. H.] 1849:630 [Reisen in Britisch-Guiana; ref. 3072] Guyana. Syntypes: ZMB 3151 (1). •Synonym of Megalechis thoracata (Valenciennes 1840) -- (Reis 1997:310 [ref. 22747], Reis in Reis et al. 2003:305 [ref. 27061], DoNascimiento 2016:531 [ref. 34727]). •Valid as Megalechis picta (Müller & Troschel 1849) -- (Reis et al. 2005:680 [ref. 28320], DoNascimiento et al. 2017:72 [ref. 35633], Urbano-Bonilla et al. 2018:77 [ref. 35773], Meza-Vargas et al. 2021:25 [ref. 39298], Taphorn et al. 2022:45 [ref. 41297]). Current status: Valid as Megalechis picta (Müller & Troschel 1849). Callichthyidae: Callichthyinae. Distribution: South America: east of the Andes in the Amazon, Orinoco and Essequibo river basins (Bolivia, Brazil, Colombia, Guyana, Peru and Venezuela). Habitat: freshwater.