nigrescens, Alosa pontica var. Antipa [G.] 1904:300 [Anzeiger der Kaiserlichen Akademie der Wissenschaften, Wien, Mathematisch-Naturwissenschaftliche Classe v. 41 (no. 19); ref. 129] Northwest coast of Black Sea and lower Danube [Donau] River, Romania. Syntypes: ?NMW 92939 (3). Appeared in more detail in Antipa 1906:21, Pl. 1 (figs. 1-3) [ref. 6859]. •Synonym of Caspialosa kessleri (Grimm 1887), subspecies pontica (Eichwald 1838) -- (Berg 1948:124 [ref. 12882]). •Synonym of Alosa pontica (Eichwald 1838) -- (Svetovidov 1973:108 [ref. 7169], Whitehead 1985:204 [ref. 5141], Kolarov 1991:337 [ref. 24842]). •Synonym of Alosa immaculata Bennett 1835 -- (Kottelat 1997:38 [ref. 22952], Parin et al. 2014:55 [ref. 33547]). Current status: Synonym of Alosa immaculata Bennett 1835. Alosidae. Habitat: freshwater, brackish, marine.