fluviatilis, Cernua Fleming [J.] 1828:212 [A history of British animals; ref. 1339] Rivers of England. No types known. Based in part on Perca cernua Linnaeus 1758. •Synonym of Gymnocephalus cernuus (Linnaeus 1758) -- (Kottelat 1997:172 [ref. 22952]). Current status: Synonym of Gymnocephalus cernua (Linnaeus 1758). Percidae: Percinae. Habitat: freshwater, brackish.