The Earliest Known Dino? 69
sciencehabit writes "A team of paleontologists thinks it may have identified the earliest known dinosaur — a creature no bigger than a Labrador retriever that lived about 243 million years ago. That's at least 10 million years earlier than the oldest known dinos and could change researchers' views of how they evolved. But some scientists, including the study's authors, caution that the fossils could instead represent a close dino relative."
Re:Birds and dinosaurs (Score:5, Informative)
Re:Birds and dinosaurs (Score:4, Informative)
So the question for this reconstructed animal is not so much if it fits a morphological definition of a dinosaur, but rather if the last common ancestor of this animal and a bird was living later than the last common ancestor of birds and crocodiles. If yes, then it would put it definitely into dinosaur territory, being either an early dinosaur or a member of one of the sister groups of early dinosaurs. If no, it might still be an archosaur, closer related to recent birds and crocodiles than to other lizards and snakes.