peloponensis, Leuciscus Valenciennes [A.] in Cuvier & Valenciennes 1844:197 [Histoire naturelle des poissons v. 17; ref. 1010] Morea, Peloponnese Peninsula, Greece. Holotype (unique): MNHN 0000-3905. Type catalog: Bertin & Estève 1948:62 [ref. 19574], Almaça 1969:1127 [ref. 20712]. •Synonym of Leuciscus cephalus (Linnaeus 1758) -- (Kottelat 1997:65 [ref. 22952]). •Valid as Squalius peloponensis (Valenciennes 1844) -- (Sanjur et al. 2003:23 [ref. 28742] as peloponnensis, Doadrio & Carmona 2006:200 [ref. 28975], Kottelat & Freyhof 2007:271 [ref. 29996], Bogutskaya & Zupančič 2010:53 [ref. 30905], Zupančič et al. 2010:156 [ref. 31002], Perea et al. 2010:14 [ref. 31802], Barbieri et al. 2015:66 [ref. 35029], Buj et al. 2019:[16] [ref. 37174]). Current status: Valid as Squalius peloponensis (Valenciennes 1844). Leuciscidae: Leuciscinae. Distribution: Greece. Habitat: freshwater.