Named By: Othniel Charles Marsh - 1873.
Classification: Chordata, Mammalia, Perissodactyla, Brontotheriidae.
Species: B. gigas (type), B. leidyi, B. hatcheri, B. ingens, B. platyceras.
Size: 2.5 meters tall at the shoulder.
Known locations: USA.
Time period: Late Eocene to early Oligocene.
Fossil representation: Many specimens.
like with many other ancient animals such as Paraceratherium
undergone a lot of controversial reclassification with many
palaeontologists considering it a species of Megacerops.
this is not universally accepted, the two genera are very close to
one another in form, and both have a Y-shaped nasal horn that most
probably served as a display feature. Many Brontotherium
have been found in deposits of volcanic ash which not only indicates
that the area they lived in was geologically active, but that these
mammals lived in groups.
Brontotherium is the type genus of the Brontotheriidae, and like other members of this group of mammals they resembled modern rhinos in both form and ecological niche. Like in some related mammals, Brontotherium had greatly enlarged neural spines rising up from the forward dorsal vertebrae which served as attachment points for the powerful neck muscles that supported the head. Remains of these beasts have also been identified as the thunder horses that exist in Native American culture.