Mammals
Fossil mammals belong to the group of Vertebrates. Land animals from mouse to elephant are part of this group, but also sea mammals like whales. The oldest mammals are known from the Triassic period. After the extinction of the dinosaurs at the end of the Cretaceous period, the mammals could evolve quickly.
The first sea mammals are known from the Eocene (part of the Paleogene period). Very famous mammals are the whooly mammoth from the ice age deposits from the Pleistocene. |
