nicaeensis, Alburnus (Chalcalburnus) chalcoides Battalgil [F.] 1941:179 [Revue de la Faculté des Sciences de l'Université d'Instanbul, Série B: Sciences Naturelles v. 6 (nos 1-2); ref. 13194] Lake Iznik, Anatolia, Turkey. Syntypes: whereabouts unknown. •Synonym of Chalcalburnus chalcoides (Güldenstädt 1772) -- (Kottelat 1997:53 [ref. 22952]). •Synonym of Alburnus chalcoides (Güldenstädt 1772) -- (Bogutskaya 1997:165 [ref. 23566] as nicaensis). •Valid as Alburnus nicaeensis Battalgil 1941 -- (Freyhof & Kottelat 2007:205 [ref. 29339], Özuluğ & Freyhof 2007:244 [ref. 29341], Bogutskaya & Coad 2009:170 [ref. 30270], Çiçek et al. 2015:146 [ref. 35151], Çiçek et al. 2018:10 [ref. 36267], Çiçek et al. 2020:251 [ref. 37644], Çiçek et al. 2023:392 [ref. 40625], Çiçek et al. 2024:220 [ref. 40789]). Current status: Valid as Alburnus nicaeensis Battalgil 1941. Leuciscidae: Leuciscinae. Distribution: Asia Minor: Marmara Sea region, Iznik Gölü, Bursa Province (Turkey). Extinct. Habitat: freshwater.