czekanowskii, Acerina Dybowski [B. N.] 1874:383 [Verhandlungen der K.-K. zoologisch-botanischen Gesellschaft in Wien v. 24 (no. 3-4); ref. 1172] Middle and lower Angara River, Siberia, Russia. Syntypes: whereabouts unknown. Original as czekanowskü. •Synonym of Acerina cernua (Linnaeus 1758) -- (Berg 1949:1046 [ref. 20662]). •Synonym of Gymnocephalus cernuus (Linnaeus 1758) -- (Kottelat 1997:172 [ref. 22952]). •Synonym of Gymnocephalus cernua (Linnaeus 1758) -- (Parin et al. 2014:354 [ref. 33547]). Current status: Synonym of Gymnocephalus cernua (Linnaeus 1758). Percidae: Percinae. Habitat: freshwater, brackish.