Review: Megalodon (Wild Safari by Safari Ltd.)

This version of the “roofed lizard” measures 23 cm long from nose to tail tip and stands just over 11 cm tall at the tip of its plates.
Hyaenodon was an interesting predatory animal that first evolved 42 million years ago and lived from the Late Eocene through to Early Miocene. The first thing to know about them is that they are not related to hyenas. In fact, they were a creodont, a long extinct group of mammals that did not survive the Miocene.
The Dimetrodon measures a good 17 cm long and is 9 cm tall including the sail.