†Zygolophodon Vacek, 1877 †Mammut Blumenbach, 1799 The Mammutidae are a family of extinct proboscideans that lived between the Miocene and the Pleistocene to Holocene. The family was first described in 1922, classifying fossil specimens of the type genus Mammut (mastodons), and has since been placed in various arrangements of the order. The na... Found on http://en.wikipedia.org/wiki/Mammutidae