Huso huso (Linnaeus, 1758) – Native (Fig. 26) Acipenser huso Linnaeus [C.] 1758: 238; Type locality: Danube and the rivers of Russia. No types known. Acipenser albula Forster [J. R.] 1767: 354; Type locality: Volga River, Russia. No types known. Acipenser beluga Forster [J. R.] 1767: 354; Type locality: Volga River, Russia. No types known. Acipenser shyp Forster [J. R.] 1767: 353; Type locality: Turkey, Bosphore or Sea of Marmara (Mediterranean Sea). Neotype: NRM 8946. Acipenser schypa Gmelin [J. F.] 1789: 1484; Type locality: Turkey, Bosphore or Sea of Marmara (Mediterranean Sea). Neotype: NRM 8946. Acipenser ichthyocolla Billberg [G. J.] 1833: 52; Type locality: Danube and the rivers of Russia. No types known. Huso ichthyocolla Bonaparte [C. L.] 1846: 22; Unneeded new name for Acipenser huso Linnaeus 1758. Acipenser vallisnerii Molin [R.] 1853: 366, 371; Type locality: Po River, Italy. Acipenser maeoticus Sal’nikov [N. I.] & Malyatskii [S. M.] 1934: 44; Type locality: Sea of Azov. No types known. Huso huso ponticus Sal’nikov [N. I.] & Malyatskii [S. M.] 1934: 44; Type locality: Black Sea. No types known. Huso huso caspicus Babushkin [N. Ya.] 1942: 131; Type locality: Caspian Sea. No types known. Huso huso orientalis Lelek [A.] 1987: 55; Type locality: Black Sea. Common name: Pr: Fil mahi, Mahi-ye khaviar, En: Beluga. Diagnosis: Very large and massive body, crescent-shaped mouth (small and transverse in other sturgeons) and the gill membranes being joined as a fold across the isthmus. Meristic characters: D: 48–81, A: 22–41, GR: 16–36, DS: 9–17, LSC: 28–60, VS: 7–14. Distribution: Caspian Sea basin (Fig. 27). Translocated from the Caspian Sea basin to the Persis and Tigris basin for aquaculture purposes. See Acipenser gueldenstaedtii. Taxonomy: Berg (1949) placed in Huso. Conservation: IUCN: Critically Endangered A2cde (Gesner et al. 2010a).

Published as part of Jouladeh-Roudbar, Arash, Ghanavi, Hamid Reza & Doadrio, Ignacio, 2020, Ichthyofauna From Iranian Freshwater: Annotated Checklist, Diagnosis, Taxonomy, Distribution and Conservation Assessment, pp. 1-14 in Zoological Studies 59 (21) on pages 18-19, DOI: 10.6620/ZS.2020.59-21, http://zenodo.org/record/12822787