Sturgeons

”Sturgeon” is the common name for the 27 species of fish belonging to the family Acipenseridae. The earliest sturgeon fossils date to the Late Cretaceous, and are descended from other, earlier acipenseriform fish, which date back to the Early Jurassic period, some 174 to 201 million years ago. They are one of two living families of the Acipenseriformes alongside paddlefish (Polyodontidae). The family is grouped into five genera: Acipenser, Huso, Scaphirhynchus, Sinosturio, and Pseudoscaphirhynchus. Two species (H. naccarii and S. dabryanus) may be extinct in the wild, and one (P. fedtschenkoi)

species of fish

Huso is a genus of sturgeons from eastern Europe, Asia, and eastern North America. The genus name is derived from hūso, the Old High German and Medieval Latin word for "sturgeon", which is also ancestral to Hausen, the German name for the beluga sturgeon.

species of fish

caviar made of the roe of the beluga sturgeon (Huso huso)

Protoscaphirhynchus squamosus is an extinct sturgeon from the Late Cretaceous of North America. It is known from a single poorly preserved specimen found in the Maastrichtian aged Hell Creek Formation in Montana. Due to its poor preservational state, it has few diagnostic characters.