Archosaurs To Dinosaurs
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| The Archosauria → Dinosauria Series | |||||
|---|---|---|---|---|---|
| Appearance | Taxa | Relationships | Status | Description | Image |
| ??? Ma |
Genus:
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The oldest known archosaur, Proterosuchus was one of the largest land reptile during the Early Triassic, about the size of to today's Komodo dragons. It looked somewhat crocodile-like, with sprawling legs, long jaws, powerful neck muscles and a long tail. A distinct proterosuchid trait is the peculiar hook-shaped mouth. | |||
| ??? Ma |
Genus:
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| ??? Ma |
Genus:
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The oldest known animal on the dinosaur/pterosaur side of the archosaurian tree (the Ornithodira), dating to about 245 million years ago. | A small, lightly built animal. It had a fairly long neck (contrary to the short necked relatives of crocodiles, but ran on all four. | ||
| ??? Ma |
Genus:
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Known from a somewhat fragmentary find, Spondylosoma was possibly an early dinosaur, or near dinosaur. It has however also been classified as a rauisuchian. | |||
| 228 Ma |
Genus:
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A very early representative of the sauropod stem line or perhaps even the Saurischia as a whole. | A small (1 meter, ~ 10 kg) bipedal carnivore with numerous sharp teeth. It was a swift digigrade runner. The forelimbs were half the length of the hindlimbs and the hands had five fingers | ||
Read more about this topic: List Of Transitional Fossils