What is "samotherium"

Samotherium ("beast of Samos") is an extinct genus of giraffe from the Miocene and Pliocene of Eurasia and Africa. Samotherium had two ossicones on its head, and long legs. The ossicones usually pointed upward, and were curved backwards, with males having larger, more curved ossicones, though, in the Chinese species, S. sinense, the straight ossicones point laterally, not upwards. The genus is closely related to Shansitherium.

According to biologist Richard Ellis, the skull of a Samotherium is portrayed on an ancient Greek vase as a monster that Heracles is fighting.