Scientists have long debated where pterosaurs fit on the evolutionary tree. The leading theory today is that pterosaurs, dinosaurs and crocodiles are closely related and belong to a group known as archosaurs. One of the closest early cousins of pterosaurs was probably a small terrestrial reptile known as Scleromochlus taylori. The size of a blackbird, this reptile had long legs, short arms, and no wings.


  • Title: Scleromochlus taylori
  • Creator: Photo: AMNH

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