caspia, Clupeonella delicatula Svetovidov [A. N.] 1941:808 [Comptes Rendus (Doklady) de l'Académie des Sciences de l'URSS v. 31 (no. 8); ref. 18864] Volga Delta, Russia, Caspian Sea. Lectotype: ZIN 15883 (152 mm, jar not found in 1996). Paralectotypes: ZIN 15883 (5 juv.). Also described as new in Svetovidov 1945:208 [ref. 13154]. Lectotype established by Svetovidov 1952:199 [ref. 21481]. •Synonym of Clupeonella cultriventris (Nordmann 1840), but a valid subspecies as described -- (Kozlovsky 1991:55 [ref. 24827], Coad 1995:8 [ref. 23608], Reshetnikov et al. 1997:728 [ref. 24702]). •Valid as Clupeonella caspia Svetovidov 1941 -- (Kottelat & Freyhof 2007:76 [ref. 29996], Esmaeili et al. 2010:366 [ref. 33391], Jouladeh-Roudbar et al. 2015:860 [ref. 34062], Esmaeili et al. 2017:29 [ref. 35254], Esmaeili et al. 2018:9 [ref. 36089], Jouladeh-Roudbar et al. 2020:27 [ref. 37983], Dyldin et al. 2022:[16] [ref. 39193] with question). •Synonym of Clupeonella cultriventris (Nordmann 1840) -- (Bogutskaya & Naseka 2004:38 [ref. 28183], Dyldin et al. 2020:86 [ref. 37569], Çiçek et al. 2024:36 [ref. 40789]). Current status: Synonym of Clupeonella cultriventris (Nordmann 1840). Ehiravidae. Distribution: Eurasia: Caspian Sea basin [if valid]. Habitat: freshwater, brackish, marine.