Prehistoric Mammals

Prehistoric Mammals

About Prehistoric Mammals

Prehistoric mammals are groups of mammals that became extinct before humans developed writing. 164 million years ago, in the Jurassic period, Castorocauda lutrasimilis, a mammaliaform (mammal-shaped) animal weighing about 500 grams (1.1 lb), had a full mammalian pelt, with guard hairs and underfur, webbed feet, and scales on the tail like a modern beaver, as well as teeth specialized for catching fish.

Contributions by 98.165.147.124, Astropithicus, and 125.164.190.103.