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This is a brain endocast of the a coyote
Most of the study on these fossils was done by Davidson Black until his death in 1934
It may have been the ancestor of Smilodon
It took then the name of the oldest known generic synonym
Herrerasaurus ischigualastensis, skull Deinonychus Specify which dig panel youHerrerasaurus (huh RARE ah SAWR us) (meaning "Herrera's lizard;" Victorino Herrera was a rancher who discovered the fossil) was a late Triassic archosaur (a reptile that was almost a dinosaur) from about 230 million years ago. It used to be thought to be a very early dinosaur and a primitive prosauropod. It was a speedy bipedal carnivore about 17 feet long, weighing roughly 440 780 pounds. It had a short neck and a large head. Three partial skeletons
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