Science and Medicine

Bistahieversor

Bistahieversor (meaning "Bistahi destroyer"), also known as the "Bisti Beast", is a genus of eutyrannosaurian theropod dinosaur, closely related to tyrannosaurids if not one. The genus contains only a single known species, B. sealeyi, described in 2010, from the Late Cretaceous of New Mexico. The holotype and a juvenile were found in the Hunter Wash Member of the Kirtland Formation, while other specimens came from the underlying Fossil Forest member of the Fruitland Formation. This dates Bistahieversor approximately 75.5 to 74.5 million years ago during the Campanian age, found in sediments spanning a million years.

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