Here 2010 is hardly two-months old, and already a number of new dinosaur taxa have been described. The most exciting among these may be a new tyrannosarid, Bistahieversor sealeyi, from the Late Cretaceous of New Mexico, and a new brachiosaurid, Abydosaurus mcintoshi, from relatively older Late Cretaceous beds in Utah. Bistahieversor, known from both adult and subadult specimens from the Kirtland Formation, would have measured some thirty feet in life. The gigantic Abydosaurus, discovered in the Mussentuchit Member of the Cedar Mountain Formation, is known from four skulls and others remains (this is highly unusual, as sauropod skulls are generally among the rarest of dinosaur remains).
Skull of adult Bistahieversor during preparation, still in field jacket.
Reconstruction of adult and subadult skulls of Bistahieversor.
Abydosaurus skull and paleontologist Brooks Britt.