grunniens, Corvina Jardine [W.] & Schomburgk [R. H.] in Schomburgk 1843:136, Pl. 2 [The natural history of fishes of Guiana.--Part II; ref. 3948] Commaca Island, Essequibo River, Guyana. No types known. •Valid as Pachyurus grunniens (Jardine & Schomburgk 1843) -- (Chao 1978:43 [ref. 6983]). •Valid as Petilipinnis grunniens (Jardine & Schomburgk 1843) -- (Casatti 2002:171 [ref. 26626] with author as Schomburgk but as Jardine on p. 179, Casatti in Reis et al. 2003:601 [ref. 27061] with author as Jardine, Parenti 2020:43 [ref. 37439]). Current status: Valid as Petilipinnis grunniens (Jardine & Schomburgk 1843). Sciaenidae. Distribution: South America: Amazon, Cuyuni and Essequibo river basins (Brazil, Guyana and Venezuela). Habitat: freshwater.