Dinosaurs / Cretaceous / Bistahieversor
Bistahieversor
Cretaceous bis-tah-hee-ee-VER-sor, “Bistahi destroyer”
Bistahieversor was a large, robust tyrannosauroid native to the southern region of Laramidia, unearthed in New Mexico's Bisti/De-Na-Zin Wilderness. Living approximately 74 million years ago, it reached around nine metres in length and weighed roughly three tonnes. Branching outside the core family Tyrannosauridae, it represents a distinct southern radiation of large predators during the Late Cretaceous.
Its deep snout featured an unusual extra opening, or fenestra, above the eye.
Where and when
Bistahieversor lived in the Late Cretaceous, from 74.5 to 73 million years ago (Campanian age). Its remains come from United States, in the Kirtland Formation.
The numbers
Length 8.5 m (estimates run from 8 to 9 m). Mass about 2.6 t. Hip height about 2.8 m. That is 5 human-lengths, or 0.76 of a double-decker bus. These are estimates from near-complete skeleton; fields marked estimated by the site are length, mass, hip height.