Stegotetrabelodon orbus

Stegotetrabelodon orbus is an extinct primitive elephantid known from East Africa, with fossils from Kenya and Uganda. It lived from the Late Miocene into the Early Pliocene, spanning from about 7.5 million years ago to possibly as late as 4.2 million years ago. As a member of the genus Stegotetrabelodon, the earliest and most primitive branch of the elephant family, it kept features inherited from gomphothere ancestors, including permanent premolar teeth and a long lower jaw carrying large lower tusks, the longest known among proboscideans. Footprint tracks in the United Arab Emirates attributed to the genus suggest that these animals lived in herds.