Samotherium 2015 study found that "Samotherium" had a neck intermediate in length between the giraffe and the okapi, judging from examination of specimens of "S. major" from Greece. Samotherium Samotherium ("beast of Samos") is an extinct genus of Giraffidae 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 and
Giraffe of faster evolution. The divergence of giraffe and okapi lineages dates to around 11.5 mya. A small group of regulatory genes in the giraffe appear to be responsible for the animal's stature and associated circulatory adaptations. The IUCN currently recognises only one species of giraffe with nine subspecies. In 2001, a two-species taxonomy was proposed. A 2007 study on the genetics of "Giraffa", suggested they were six species: the West African, Rothschild's, reticulated, Masai, Angolan, and South African giraffe. The study deduced from genetic differences in nuclear and mitochondrial DNA (mtDNA) that giraffes from these populations are reproductively isolated and