Acipenseriformes

Acipenseriformes, the sturgeons, is an order of fish. Atlantic sturgeon is an example of sturgeon. Acipenseriformes live in freshwater lakes.

The two most notable members are sturgeons and paddlefish.

 Description 
Acipenseriformes have ossified axial skeletons. The quadratojugal bones are three-pointed.

 Classification 

 Order Acipenseriformes Berg, 1940
 Genus †Eochondrosteus Lu, Li & Yang, 2005
 Family †Chondrosteidae Egerton, 1858
 Genus †Chondrosteus Agassiz, 1833–1844
 Genus †Gyrosteus Agassiz, 1833–1844
 Genus †Strongylosteus Agassiz, 1833–1844
 Family †Peipiaosteidae Liu & Zhou, 1965
 Genus †Spherosteus Jakovlev, 1968
 Genus †Yanosteus Jin et al., 1995
 Genus †Liaosteus Lu, 1995
 Genus †Peipiaosteus Liu & Zhou, 1965
 Genus †Stichopterus Reis, 1909
 Suborder Acipenseroidei Grande & Bemis, 1991
 Family Polyodontidae Bonaparte, 1838 (paddlefish)
 Genus †Protopsephurus Lu, 1994
 Genus †Paleopsephurus MacAlpin, 1941a
 Genus †Pugiopsephurus Hilton et al., 2023
 Genus †Parapsephurus Hilton et al., 2023
 Subfamily Polyodontinae Grande & Bemis, 1991 non Pflugfelder, 1934
 Genus †Crossopholis Cope, 1883
 Genus Polyodon Lacépède, 1797 (American paddlefish)
 Genus †Psephurus Günther, 1873 (Chinese paddlefish)
 Family Acipenseridae Bonaparte, 1831 sensu Bemis et al., 1997 (sturgeons)
 Genus †Boreiosturion Murray et al. 2023
 Genus †Protoscaphirhynchus Wilimovsky, 1956
 Genus †Engdahlichthys Murray et al. 2020
 Genus †Anchiacipenser Sato, Murray, Vernygora and Currie, 2019
 Genus †Priscosturion Grande & Hilton, 2009 [Psammorhynchus Grande & Hilton, 2006]
 Genus Acipenser Linnaeus, 1758
 Genus Huso J. F. Brandt & Ratzeburg, 1833
 Genus Scaphirhynchus Heckel, 1835
 Genus Pseudoscaphirhynchus Nikolskii, 1900

 Hybridization 

In July 2020, a team of scientists successfully managed to hybridize a Russian sturgeon and an American paddlefish, proving that despite separated lineages, these two fishes can breed with each other.

References