|Named By:||Williston in 1911|
|Time Period:||Late Carboniferous - Early Permian, 301-298 Ma|
|Size:||1 meter long|
|Fossil(s):||Enough remains are known to enable reconstruction|
|Classification:||| Chordata | Amphibia | Temnospondyli | Euskelia | Dissorophoidea | Dissorophidae ||
Platyhystrix (meaning "flat porcupine") was a temnospondyl amphibian with a distinctive sail along its back, similar to the unrelated synapsids, Dimetrodon and Edaphosaurus. It lived during the latest Carboniferous and earliest Permian periods in Texas, about 300 million years ago.