Platyoposaurus are amphibians planned to appear in Additional Creatures: Endemics.
Platyoposaurus, meaning "Flat-Faced Lizard", is a large amphibian that lived in Russia during the Early Permian, 270 million years ago. Platyoposaurus was an archegosaur, which were a clade of amphibians that were completely aquatic, and had metabolisms similar to fish than to amphibians. Another notable member of this group is Prionosuchus.
Platyoposaurus is planned to be added to Additional Creatures: Endemics where, while still having an identity of its own, will have a currently unknown type of relationship with the Prionosuchus of the Prehistoric Beasts mod.