| Protoscaphirhynchus Temporal range:
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|---|---|
Scientific classification 
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| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Acipenseriformes |
| Family: | Acipenseridae |
| Genus: | †Protoscaphirhynchus Wilimovsky, 1956 |
| Species: | †P. squamosus
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| Binomial name | |
| †Protoscaphirhynchus squamosus Wilimovsky, 1956
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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.1
References
References
- 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.