nigrum, Melanocharacidium Buckup [P. A.] 1993:128, Fig. 12 [Ichthyological Exploration of Freshwaters v. 4 (no. 2); ref. 20831] Rio Mucajaí, upstream of Ilha do Paredao, Território Federal de Roraima, Brazil. Holotype: INPA 1681. Paratypes: INPA 746 (2, 1 c&s), 1680 (1); MZUSP 27010 (1), 43699 (1). Not treated in Buckup in Reis et al. 2003:92 [ref. 27061], added in Corrigenda (2005). •Valid as Melanocharacidium nigrum Buckup 1993 -- (DoNascimiento et al. 2017:35 [ref. 35633], Taphorn et al. 2022:21 [ref. 41297]). Current status: Valid as Melanocharacidium nigrum Buckup 1993. Crenuchidae: Characidiinae. Distribution: South America: Brazil, Colombia and Guyana. Habitat: freshwater.