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ResearchBlogging.orgTHERE ARE certain niches that seem to be filled by one species or another at any time period. In my recent post on mammalian evolution, for instance, I mentioned Castorocauda, a Jurassic mammaliform that seems to have fit into the niche now occupied by beavers or otters. But occasionally we run across an animal that seems to be adapted for a unique role in its ecosystem. One of these animals is Simocyon. This is a puma-sized caniform that lived about 14 million years ago, and died out by four million years ago. Simocyon has a variety of unusual adaptations.

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