Brontotherium
Brontotherium is a genus of brontothere that lived during the Eocene period. Male brontotheres have been observed very differently with females.
Other inhabitants
Brontotherium co-existed with Embolotherium, Indricotherium, Hyaenodon, Chalicotherium and Paraceratherium, as well as ocean-dwelling creatures like Dorudon, Basilosaurus and Otodus.
Etymology
Brontotherium comes from Ancient Greek βροντή (brontḗ), meaning "thunder", and θηρίον (theríon), meaning "beast".
Brontotherium Media
Megacerops head reconstruction at the American Museum of Natural History
AMNH 518, from South Dakota. This M. coloradensis specimen has a healed broken rib, not pictured here.