eli5: Why are pterosaurs not considered dinosaurs?

44 views
0

eli5: Why are pterosaurs not considered dinosaurs?

In: 32

Answer: because they fly, and because their arms stretched out to their sides. They are, in fact, distant dinosaur cousins having evolved on a different branch from a common ancestor.

Because tero isn’t dino. I mean hasn’t anyone seen dinosaurs train?

The current methodology behind classification of living organisms is one based on descent and ancestry. In short, the animals that would become pterosaurs split off and diverged from the animals that would become dinosaurs.

The simple answer is “Because they’re pterosaurs.”

Pterosaurs aren’t dinosaurs for the same reason a bat isn’t a mouse. They’re a different species of animal with different physical traits.

Pterosaurs and dinosaurs are two types of the larger group of archosaurs. They have a few different features. Dinosaurs (including birds) have a hole in their hip socket and a crest on their upper arm bone.