heckelii, Leuciscus Nordmann [A. von] 1840:491, Pl. 23 (fig. 1) [Voyage dans la Russie méridionale et la Crimée; ref. 3209] Crimea, Ukraine, Black Sea. No types known. Syntypes: ZIN 3008-09 (3). •Synonym of Rutilus rutilus (Linnaeus 1758), but a valid subspecies -- (Berg 1949:500 [ref. 20661], Bogutskaya 1997:179 [ref. 23566], Michajlova 1989:25 [ref. 20062] as heckeli). •Questionably valid as Rutilus heckelii (Nordmann 1840) -- (Kottelat 1997:78 [ref. 22952]). •Synonym of Rutilus rutilus (Linnaeus 1758) -- (Bogutskaya 1998:70 [ref. 23589] as heckeli, Parin et al. 2014:92 [ref. 33547]). •Synonym of Rutilus lacustris (Pallas 1814) -- (Levin et al. 2017:44 [ref. 35061], Dyldin et al. 2020:87 [ref. 37569], Jouladeh-Roudbar et al. 2020:144 [ref. 37983]). •Valid as Rutilus heckelii (Nordmann 1840) -- (Fricke et al. 2007:46 [ref. 29533], Kottelat & Freyhof 2007:241 [ref. 29996], Marić 2010:157 [ref. 31515] as heckeli, Perea et al. 2010:15 [ref. 31802], Dyldin et al. 2020:81 [ref. 37569]). Current status: Valid as Rutilus heckelii (Nordmann 1840). Leuciscidae: Leuciscinae. Distribution: Eurasia: Black Sea basins. Habitat: freshwater, brackish.