kosswigi, Leuciscus Karaman [M. S.] 1972:146, Fig. 12 [Mitteilungen aus dem Hamburgischen Zoologischen Museum und Institut v. 69; ref. 2561] Gumuldur [Gümüldür], south from Izmir, Turkey. Holotype: ZMH H4555. Paratypes: ZMH H4556 (2). Type catalog: Wilkens 1977:158 [ref. 22013]. •Synonym of Leuciscus cephalus (Linnaeus 1758) -- (Bogutskaya 1997:173 [ref. 23566]). •Synonym of Squalius cephalus (Linnaeus 1758). •Valid as Squalius kosswigi (Karaman 1972) -- (Turan et al. 2009:60 [ref. 30540], Bogutskaya & Zupančič 2010:53 [ref. 30905], Perea et al. 2010:14 [ref. 31802], Özuluğ & Freyhof 2011:108 [ref. 31360], Çiçek et al. 2015:147 [ref. 35151], Çiçek et al. 2018:15 [ref. 36267], Çiçek et al. 2020:253 [ref. 37644], Çiçek et al. 2023:412 [ref. 40625], Çiçek et al. 2024:258 [ref. 40789]). Current status: Valid as Squalius kosswigi (Karaman 1972). Leuciscidae: Leuciscinae. Distribution: Asia Minor: Mediterranean Sea tributary, Izmir Province (Turkey). Habitat: freshwater.