Protoscaphirhynchus

{{Short description|Extinct genus of fishes}}

{{Speciesbox

| fossil_range = {{geological range|Maastrichtian}}

| image =

| image_caption =

| genus = Protoscaphirhynchus

| parent_authority = Wilimovsky, 1956

| species = squamosus

| authority = 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.{{Cite journal |last=Hilton |first=Eric J. |last2=Grande |first2=Lance |date=2006 |title=Review of the Fossil Record of Sturgeons, Family Acipenseridae (Actinopterygii: Acipenseriformes), from North America |journal=Journal of Paleontology |volume=80 |issue=4 |pages=672–683 |doi=10.1666/0022-3360(2006)80[672:ROTFRO]2.0.CO;2 |citeseerx=10.1.1.530.9300 |jstor=4095104 |s2cid=53583501 |s2cid-access=free}}