Tiny carnivorous Eocasea martini is the oldest, and smallest, known caseid. In this illustration, the new species sits in the footprint of a much-larger herbivore relative from 30 million years later,... more 
Tiny carnivorous Eocasea martini is the oldest, and smallest, known caseid. In this illustration, the new species sits in the footprint of a much-larger herbivore relative from 30 million years later, Cotylorhynchus. less 
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LiveScience.com | Photo By Danielle Dufault
Wed, Apr 16, 2014 5:10 PM EDT