The Proboscidea of the Past

[Spalea]

" Elephant Evolution ?

About 180 million years ago, mammals arose from a reptile-like lineage about the same time as true dinosaurs. About 80 Million years ago, the genetic linage of elephants split from primates. The tree shrew is considered our nearest common ancestor.
It is believed that 50-60 million years ago, Moeritheriums, approximately the size of current day pigs, were the roots from which the proboscideans evolved. Based on both morphological and biochemical evidence, it is generally agreed that the manatees, dugongs, and hyraxes are the closest living relatives of today’s elephants. This is incredible given the vast difference in sizes, external appearance and the fact that these animals occupy completely different habitats.
The order under which Elephants are classified is the Proboscidea. This means animals with trunks/proboscis.
Over the course of evolutionary history, it has been estimated that there have been about 352 species of Probscideans. The creatures of this order have inhabited every continent except Australia and Antarctica. All but two (the African and Asian elephants) have died out. "

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