Possibly valid species: Zygolophodon is an extinct genus of mammutid proboscidean that lived during the Miocene in Africa, Eurasia, and North America.
[7][8] The species Z. turicensis had a widespread distribution in both Africa (Kenya, Tunisia), Anatolia and Europe, dating to the Early-Late Miocene,[9][8] with its earliest appearance in Europe being approximately 18-17 million years ago,[10] and last appearance in the region dating to around 7-6 million years ago.
[8] The oldest remains of Zygolophodon on the Indian subcontinent are known from the Bugti Hills of Pakistan, dating to around 19-17 million years ago.
[8] Zygolophodon entered North America during the latter part of the Early Miocene (during the late Hemingfordian faunal stage), with the oldest record being a partial tooth from Massacre Lake, Nevada, dating to 16.5-16.4 million years ago.
[3] Remains of Zygolophodon are known from across western and central North America during the following Barstovian (including Colorado, California, Montana, Oregon, Nebraska, Nevada, Wyoming and Saskatchewan).