Table of Contents
Are birds in the Dinosauria clade?
Modern phylogenies place birds in the dinosaur clade Theropoda. According to the current consensus, Aves and a sister group, the order Crocodilia, together are the sole living members of an unranked “reptile” clade, the Archosauria.
Which animals are not in the clade of dinosaurs?
Pterosaurs are not dinosaurs The order Crocodilia includes extinct and living crocodiles and their close relatives. Crocodilians are archosaurs, but they are not dinosaurs. Living crocodilians and birds (which are dinosaurs) are the only surviving members of the Archosauria clade.
What clade does birds belong to?
Aves
All birds through time (beginning with the Late Jurassic Archaeopteryx) belong to the clade Avialae; modern (Cenozoic) birds belong to the clade Aves, also called Neornithes in some of the images from the lecture.
What is clade Dinosauria?
dinosaur, (clade Dinosauria), the common name given to a group of reptiles, often very large, that first appeared roughly 245 million years ago (near the beginning of the Middle Triassic Epoch) and thrived worldwide for nearly 180 million years.
Are birds evolved from dinosaurs?
Modern birds descended from a group of two-legged dinosaurs known as theropods, whose members include the towering Tyrannosaurus rex and the smaller velociraptors.
When did birds split from dinosaurs?
about 65 million years ago
Fossil records suggest that modern birds originated 60 million years ago, after the end of the Cretaceous period about 65 million years ago when dinosaurs died off. But molecular studies suggest that the genetic divergences between many lineages of birds occurred during the Cretaceous period.
How did birds survive the dinosaur extinction?
The combination of bigger brains, small size, their ability to eat a wider palate of foods, and their ability to fly ultimately may have helped birds survive the last mass extinction.