Brontotheriidae, also called Titanotheriidae, is a family of extinct mammals belonging to the order Perissodactyla, the order that includes horses, rhinoceroses, and tapirs. Superficially they looked rather like rhinos, although they were not true rhinos and are probably most closely related to horses. They lived until the very close of the Eocene.
The skull and lowers are from Custer County, SD. The skull (upper) was collected on a cattle ranch in 1992 and the lowers found in the same area but, later in 1999.
Brontops sp. (robustus?)
Crazy Johnson Member
Custer County, SD
Molded from a privately owned specimen.
Dimensions of the fossil skull replica: 26" long x 13" wide x 24" tall.
$795 (plus shipping)