colspan=2 style="text-align: center; background-color: transparent; text-align:center; border: 1px solid red;" | AcipenseriformesTemporal range: Late Jurassic–Recent PreЄ Є O S D C P T J K 250px Atlantic sturgeon, Acipenser oxyrinchus oxyrinchus colspan=2 style="text-align: center; background-color: transparent; text-align:center; border: 1px solid red;" | Scientific classification Kingdom: Animalia Phylum: Chordata Class: Actinopterygii Order: Acipenseriformes colspan=2 style="text-align: center; background-color: transparent; text-align:center; border: 1px solid red;" | Families Acipenseridae—sturgeons Polyodontidae—paddlefishes Chondrosteidae—extinct Errolichthyidae—extinct Acipenseriformes are an order of primitive ray-finned fishes that includes the sturgeons and paddlefishes, as well as some extinct families.