calhamazon, Pachyurus Casatti [L.] 2001:167, Fig. 8C [Comunicações do Museu de Ciências da PUCRS v. 14 (no. 2); ref. 25918] Rio Branco, Estado de Roraima, Brazil. Holotype (unique): MZUSP 66684. •Valid as Pachyurus calhamazon Casatti 2001 -- (Casatti & Chao 2002:5 [ref. 26002], Casatti in Reis et al. 2003:600 [ref. 27061], Casatti & Menezes in Menezes et al. 2003:88 [ref. 27192], Parenti 2020:38 [ref. 37439]). Current status: Valid as Pachyurus calhamazon Casatti 2001. Sciaenidae. Distribution: South America: Branco River (Roraima, Brazil) endemic. Habitat: freshwater.