Ekorus
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| E. ekakeran |
Ekorus is a large extinct weasel that inhabited late Miocene Kenya. Standing 60 centimeters tall at the shoulders, its build was not at all weasel-like. Today weasels have short legs and can only achieve short bursts of speed. The legs of Ekorus are built like those of leopards. It appears that before Africa's big cats ruled the savannas, the giant weasel Ekorus chased down its victims, such as the three-toed horse Eurygnathohippus and the pig Nyanzachoerus. The reason for this evolution must have to do with the Great Rift Valley. Before the rift opened, Kenya was more forested. Eventually as moisture was drawn from the forests by the highlands, the forests opened up into grasslands. The swifter creatures built for open terrain prospered while the slower forest species perished.
Fossils of large Miocene weasels have also been discovered in North America and Asia.
