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Page 6: Other Reptilian groups at the Smithsonian

Dimetrodon
grandis
Early Permian
Texas

Edaphosaurus
boanerges
Early Permian
Texas

Two sail backed Pelycosaurs from the early Permian of Texas. Dimetrodon was a carnivore and Edaphosaurus was a plant eater. The function of their sail is still being debated today.
 

Cotylorhynchus
romeri
Early Permian
Oklahoma

Cynognathus
crateronotus

Triassic
South Africa

 
 

Pteranodon
longiceps

Trilophosaurus
buettneri
 

Phytosaur
Late triassic
Arizona

Phytosaur
late Triassic
Texas
 
 
 

Ischigualastia
jenseni
Late Triassic
Argentina

 
Dicynodont
late Permian
Cape Province,
South Africa
         
         
         

Steneosaurus
bollensis
Early Jurassic
Germany

 
Diadectes sp.
Early Permian
Texas
         
         
 
 

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