Ptyonius

{{Short description|Extinct genus of tetrapodomorphs}}

{{Automatic taxobox

| image = Extinct monsters and creatures of other days (6288814190).jpg

| image_caption = Fossils of two Ptyonius specimens

| taxon = Ptyonius

| authority = Cope, 1875

}}

Ptyonius is an extinct genus of nectridean tetrapodomorphs within the family Urocordylidae.{{Cite book |last1=Camp |first1=Charles Lewis |url=https://books.google.com/books?id=i4gQAAAAIAAJ |title=Bibliography of Fossil Vertebrates, 1928-1933 |last2=VanderHoof |first2=Vertress Lawrence |date=1940 |publisher=The Society |isbn=978-0-8137-2027-2 |pages=494 |language=en}}