Bistahieversor sealeyi

Bistahieversor sealeyi is a genus of Tyrannosaurid dinosaur from the late cretaceous of the Kirtland Formation. The dinosaur was first described in 1990 as a specimen of Aublysodon (another Tyrannosaur). In the year 2000 Bistahieversor was redescribed as a new species of Daspletosaurus. But in 2010 it was redescribed again, Read more…