schypa, Acipenser Bonnaterre [J. P.] (ex Güldenstädt) 1788:16 [Tableau encyclopédique et méthodique des trois règnes de la nature... Ichthyologie; ref. 4940] 'La mer du Nord' (erroneous, is probably Caspian Sea). No type known. Neotype designated (NRM 8946) by Kottelat 1997:34 [ref. 22952] is invalid, as the neotype is a specimen of Huso huso (Linnaeus 1758), but Bonnaterre's Acipenser schypa was exclusively based on Acipenser schypa of Güldenstädt 1772:533 [ref. 5066], which is in the synonymy of Acipenser nudiventris Lovetsky 1828 according to Kottelat 1997:31 [ref. 22952]; therefore ICZN Art. 75.3.5 is not met. Name not considered as valid after 1899; therefore reversal of priority in favor of Acipenser nudiventris Lovetsky 1828 is followed (Art. 23.9). •Synonym of Huso huso (Linnaeus 1758) -- (Kottelat 1997:34 [ref. 22952], Jouladeh-Roudbar et al. 2020:15 [ref. 37983]). •Synonym of Huso nudiventris (Lovetsky 1828). Nomen Oblitum. Current status: Synonym of Huso nudiventris (Lovetsky 1828). Acipenseridae. Habitat: freshwater, brackish, marine.