schypa, Acipenser Eichwald [C. E. von] 1831:66 [Zoologia specialis quam expositis animalibus tum vivis Pars posterior [3]; ref. 5562] Caspian Sea, unde Volga adscendit et Cyrum. Credited to "L." [Linnaeus] but this species was not described by Linnaeus; if regarded as available then it is invalid -- preoccupied by Acipenser schypa Bonnaterre 1788. •Synonym of Acipenser nudiventris Lovetsky 1828 -- (Svetovidov 1973:83 [ref. 7169], Coad 1995:7 [ref. 23608] as shypa, Jouladeh-Roudbar et al. 2020:15 [ref. 37983]). •Synonym of Huso nudiventris (Lovetsky 1828). 1°Homonym. Current status: Synonym of Huso nudiventris (Lovetsky 1828). Acipenseridae. Habitat: freshwater, brackish, marine.