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Protoscaphirhynchus Temporal range: Maastrichtian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Acipenseriformes
Family:	Acipenseridae
Genus:	†Protoscaphirhynchus Wilimovsky, 1956
Species:	†P. squamosus
Binomial name
†Protoscaphirhynchus squamosus Wilimovsky, 1956

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.

See also

• Prehistoric fish
• List of prehistoric bony fish

References

1. Hilton, Eric J.; Grande, Lance (2006). "Review of the Fossil Record of Sturgeons, Family Acipenseridae (Actinopterygii: Acipenseriformes), from North America". Journal of Paleontology. 80 (4): 672–683. CiteSeerX 10.1.1.530.9300. doi:10.1666/0022-3360(2006)80[672:ROTFRO]2.0.CO;2. JSTOR 4095104. S2CID 53583501.

v t e Chondrostei
Kingdom: Animalia Phylum: Chordata Class: Actinopterygii Clade: Actinopteri Actinopterygii see Actinopterygii Chondrostei see below↓ Chondrostei
Chondrostei †Birgeria? †Errolichthys? †Gualolepis? †Neochallaia †Bobasatraniiformes? †Guildayichthyidae? †Saurichthyiformes? †Coccolepididae Barbalepis Coccolepis Condorlepis Iyalepis Morrolepis Plesiococcolepis Sunolepis Toarcocephalus Acipenseriformes †Cylindracanthus? †Eochondrosteus †Chondrosteidae Chondrosteus Gyrosteus Strongylosteus †Peipiaosteidae Liaosteus Peipiaosteus Spherosteus Stichopterus Yanosteus Acipenseroidei Polyodontidae †Crossopholis †Paleopsephurus †Parapsephurus Polyodon †Protopsephurus †Psephurus †Pugiopsephurus Acipenseridae Acipenser †Anchiacipenser †Engdahlichthys Huso †Priscosturion †Protoscaphirhynchus Pseudoscaphirhynchus Scaphirhynchus

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• Sturgeons
• Prehistoric ray-finned fish genera
• Late Cretaceous fish of North America
• Maastrichtian life
• Hell Creek fauna
• Prehistoric ray-finned fish stubs
• Chondrostei stubs
• Prehistoric Chondrostei stubs
• Cretaceous fish stubs