Sturgeon
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Sturgeon are 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 d
Yanosteus longidorsalis, a member of the extinct acipenseriform family Peipiaosteidae from the Early Cretaceous (125–120 Mya) Yixian Formation in Liaoning, China
A fossil sturgeon (right) from the Tanis fossil site, showing the longstanding morphological conservatism of this group
The Atlantic sturgeon (A. oxyrhynchus) is one of the most basal sturgeon species
Shovelnose sturgeons (Scaphirhynchus platorynchus) are morphologically atypical members of the group
Atlantic sturgeon
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The Atlantic sturgeon is a large species of sturgeon native to both sides of the Atlantic Ocean, and associated river basins. It is a member of the family Acipenseridae, and, along with other sturgeon
Sturgeon
…However, with the advent of molecular phylogenetics, multiple studies since the 1990s have recovered this arrangement as paraphyletic, instead finding A. oxyrhinchus and A. sturio to form the most basal clade among sturgeons, and all other species being in a separate clade, with the various other species of Acipenser…
An Atlantic sturgeon at the Aquarium du Québec
Illustration