“…Caramaschi and Sazima (1985) recognized three species groups in this genus: the C. gaudichaudii group, including C. aeneus Müller, 1924, C. bokermanni Caramaschi and Sazima, 1985, C. caramaschii Bastos and Pombal, 1995 Carcerelli and Caramaschi, 1992, C. gaudichaudii Duméril and Bibron, 1841, and C. lutzorum Carcerelli and Caramaschi, 1992, characterized by protruding snout and distinct canthus rostralis; the C. trachystomus group, including C. dispar A. Lutz, 1925, C. grandis B. Lutz, 1951, and C. trachystomus (Reinhardt and Lütken, 1862"1861, characterized by short, rounded snout, and less evident canthus rostralis; and the monospecific group of C. schmidti Gallardo, 1961, characterized by very short snout and rounded canthus rostralis.…”