The origin and early evolution of dinosaurs

  title={The origin and early evolution of dinosaurs},
  author={Max Cardoso Langer and Mart{\'i}n d. Ezcurra and Jonathas de Souza Bittencourt and Fernando Emilio Novas},
  journal={Biological Reviews},
The oldest unequivocal records of Dinosauria were unearthed from Late Triassic rocks (approximately 230 Ma) accumulated over extensional rift basins in southwestern Pangea. The better known of these are Herrerasaurus ischigualastensis, Pisanosaurus mertii, Eoraptor lunensis, and Panphagia protos from the Ischigualasto Formation, Argentina, and Staurikosaurus pricei and Saturnalia tupiniquim from the Santa Maria Formation, Brazil. No uncontroversial dinosaur body fossils are known from older… 
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