| Named By: | Tvelvetrees in 1880 |
| Time Period: | Middle Permian |
| Location: | Russia - Amanakskaya Formation |
| Size: | Estimated about 2.5 meters long |
| Diet: | Carnivore/Piscivore |
| Fossil(s): | Several individuals, usually from skull fossils |
| Classification: | | Chordata | Amphibia | Temnospondyli | Archegosauridae | |
Platyoposaurus was a temnospondyl from the Middle Permian epoch about 270-268 Mya.
One of the discoveries includes a skull 28 cm long with a purported body length of 250 cm representing a carnivorous adult specimen.
The fossil remains were found in Belebey in Bashkortostan, Russia; the name Platyoposaurus means "flat-faced lizard" and was coined after the original name Platyops turned out to be preoccupied.