tanaicensis, Perca Güldenstädt [J. A. von] 1787:193 [Reisen durch Rußland und im Kaukasischen Gebürge; ref. 18175] Dnieper River, at Kamenka, Kirovohrad Oblast, Ukraine. Kottelat & Freyhof 2009:84 [ref. 30320] regard tanaicensis as an available name but not used as valid since 1899 but Perca acerina has been used. Kottelat & Freyhof 2009:84 [ref. 30320] declare that tanaicensis is a nomen oblitum and declare that Perca acerina Gmelin 1789 [they erroneously said 1788] is a nomen protectum and has precedence over P. tanaicensis. •In the synonymy of Gymnocephalus acerina (Gmelin 1789) -- (Kottelat & Freyhof 2009:84 [ref. 30320]). Nomen Oblitum. Current status: Synonym of Gymnocephalus acerina (Gmelin 1789). Percidae: Percinae. Habitat: freshwater.