richardsonii, Acipenser (Huso) Duméril [A. H. A.] 1870:120 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Upper Mississippi River, U.S.A. Holotype (unique): MNHN 0000-9113 (dry). Type catalog: Bertin 1940:250 [ref. 293]. •Synonym of Acipenser rubicundus Lesueur 1818 -- (authors). •Synonym of Acipenser fulvescens Rafinesque 1817 -- (authors). •Synonym of Huso fulvescens (Rafinesque 1817). Current status: Synonym of Huso fulvescens (Rafinesque 1817). Acipenseridae. Habitat: freshwater, brackish.