baloni, Gymnocephalus Holčík [J.] & Hensel [K.] 1974:472, Figs. 1 (upper), 3A, 4A [Copeia 1974 (no. 2); ref. 7505] Danube River at Klizská Nemá, 47°44'32.74"N, 17°48'59.21"E, Slovakia. Holotype: SNMB 2261. Paratypes: CU-RY [Comenius Univ., Fac. Sci., Bratislava] 196 (20, now 18), SNMB 2262 (10), ZSM 38081 [ex CU-RY 196] (2). Additional non-type material at CU-RY, LFRH [Lab. Fish. Res. Hydrobiol., Slovak Acad. Agric. Sci., Bratislava], ZICUP. Type catalog: Blahák 1991:205 [ref. 20023] for holotyp, Neumann 2011:275 [ref. 31652]. •Valid as Gymnocephalus baloni Holčík & Hensel 1974 -- (Collette & Bănărescu 1977:1453 [ref. 5845], Lelek 1987:282 [ref. 22962], Michajlova 1989:25 [ref. 20062], Kottelat 1997:172 [ref. 22952], Reshetnikov et al. 1997:749 [ref. 24702], Popova 1998:118 [ref. 23588], Hanel 2003:64 [ref. 27894], Bogutskaya & Naseka 2004:205 [ref. 28183], Vassilev & Pehlivanov 2005:177 [ref. 28369], Hanel & Lusk 2005:366 [ref. 28804], Kottelat & Freyhof 2007:528 [ref. 29996], Geiger & Schliewen 2010:131 [ref. 30887], Ćaleta et al. 2019:188 [ref. 37026], Dyldin et al. 2020:100 [ref. 37569], Nagy et al. 2023:358 [ref. 40348]). Current status: Valid as Gymnocephalus baloni Holčík & Hensel 1974. Percidae: Percinae. Distribution: Eastern Europe: Danube River basin introduced in Crimea (Russia/Ukraine). Habitat: freshwater.