Estemmenosuchus – a primitive therapsid from the Permian, living about 265 million years ago. It had a massive body and distinctive horns on its head, which may have been used for fights between individuals or to deter predators. It was herbivorous or omnivorous, feeding mainly on plants but likely not ignoring small animals either.

Fun fact: Estemmenosuchus is an example of early evolutionary forms that combined reptile and mammal traits.

Height: 115 cm