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Temporal range: Late Carboniferous – Early Permian
Artistic impression of a Platyhystrix rugosus
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Order: Temnospondyli
Family: Dissorophidae
Genus: Platyhystrix
Williston, 1911
Binomial name
Platyhystrix rugosus
Case, 1910

Platyhystrix was an amphibian from Carboniferous Texas. Like Dimetrodon and Edaphosaurus, it also had a sail, but it was not a Synapsid. Many of the animals from Texas and Arizona during the Early Permian Period evolved sails to control their heat due to seasonal climate.

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