The scientific name Deinoterium is a group of prehistoric mammals that lived from the Miocene to the Pleistocene, belonging to the order Longnose. Famous for its unique downward curved long teeth, which are different from the long teeth of modern elephants. They grow from the lower jaw and curve upwards, rather than from the upper jaw. Large in size, similar to modern elephants, but may have different behavioral and living habits. Fossils of terror elephants have been found in Africa, Asia, and Europe, indicating their widespread distribution. The reason for the extinction of this prehistoric behemoth is not fully understood, but it may be related to climate change and human activities.

The scientific name of the terror beast is Deinoterium, which means "terrifying beast". The terror beast belongs to the mammalian phylum, long nosed order, and terror beast family. The terror beast is a huge proboscid animal, with some individuals reaching a height of up to 5 meters, making it the third largest known terrestrial mammal to have existed. The lower jaw of the terror beast has a pair of long fangs that curve downwards and backwards, without the upper fangs found in other long nosed animals. The terror beasts appeared in the Miocene and lived until the early Pleistocene. Fossils of terror beasts have been found in all major excavation sites in East Africa, including Hadar, Letoli, Olduvai Gorge, and Lake Turkana.