Dinosaurs A to Z
Tyrannosauridae

Bistahieversor

"Bistahi destroyer"

Generic theropod body-plan outline
You 1.8 m (5.9 ft) tall
Bistahieversor 9 m (29.5 ft) long
as long as 6 people standing fingertip to fingertip
generic theropod body plan, scaled to length — not a silhouette of Bistahieversor
Length
9 m (29.5 ft)
Period
Late Cretaceous (75.5–74.5 Mya)
Place
Mexico · New Mexico, USA
Food
Carnivore
Clade
Tyrannosauridae Dinosauria Saurischia Theropoda Coelurosauria Tyrannosauroidea Late-Cretaceous tyrants: T. rex, Tarbosaurus, Albertosaurus.

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.

What we know

  • Named by Carr & Williamson, 2010.
  • Body length estimated at about 9 m.
  • Fossils found in Mexico and New Mexico, USA.

What we guess

The reconstruction notes for Bistahieversor — soft tissue, color, behavior — haven't been written up yet. Only the recorded basics above are filled in so far.