Are Dinosaurs Diapsids

Modern diapsids include lizards, snakes, turtles, birds, and crocodylians; extinct diapsids include dinosaurs, pterosaurs, ichthyosaurs, and many other familiar taxa. The stem-based name Diapsida is derived from the presence of a pair of fenestrae in the temporal region of the skull.

Are dinosaurs synapsids?

Dinosaurs are archosaurs, a larger group of reptiles that first appeared about 251 million years ago, near the start of the Triassic Period. … Nor is Dimetrodon or other reptiles in the same group (previously called ‘mammal-like reptiles’ and now called synapsids).

Are Triceratops diapsids?

CLASSIFICATION: Kingdom Animalia (animals) Phylum Chordata (having a hollow nerve chord ending in a brain) Class Archosauria (diapsids with socket-set teeth, etc.)