Bistahieversor
Bistahieversor, meaning "Bistahi destroyer," is a genus of eutyrannosaurian theropod dinosaur that lived in what is now New Mexico during the Late Cretaceous period, approximately 75.5 to 74.5 million years ago. This dinosaur, also known as the "Bisti Beast," was a formidable predator, closely related to tyrannosaurids, and possessed distinct anatomical features that set it apart from its more well-known relatives.
Key Facts
- ›Bistahieversor lived approximately 75.5 to 74.5 million years ago during the Campanian age of the Late Cretaceous.
- ›Its scientific name, Bistahieversor, translates to "Bistahi destroyer," referencing the Navajo word for its discovery location and "destroyer" in Latin.
- ›Adults are estimated to have been around 9 meters (30 ft) long and weighed at least a ton, with some estimates reaching 3.3 metric tons.
- ›Distinctive features include 64 teeth, an extra opening above the eye, and a keel along the lower jaw.
- ›Fossils have been found in the Hunter Wash Member of the Kirtland Formation and the Fossil Forest member of the Fruitland Formation in New Mexico.
- ›It possessed a heightened sense of smell, increased agility, and sophisticated gaze stabilization, along with binocular vision.
- Estimated adult length of around 9 meters
- Estimated adult weight of at least 1 metric ton
- Deep snout
- Possesses 64 teeth
- Has an extra opening above the eye
- Features a keel along the lower jaw
- Complex joint at the "forehead" for skull stabilization
- Large olfactory bulbs indicating a keen sense of smell
- Elongated semi-circular canals suggesting increased agility and gaze stabilization
- Possessed binocular vision
Tyrannosaurids, Daspletosaurus, Teratophoneus, Labocania, Dynamoterror, Appalachiosaurus, Dryptosaurus, Albertosaurinae, Jinbeisaurus
North America
About Bistahieversor
Bistahieversor, scientifically known as Bistahieversor sealeyi, is a genus of eutyrannosaurian theropod dinosaur that roamed the Earth during the Late Cretaceous period. Its name, translating to "Bistahi destroyer," reflects both its discovery location in the Bisti/De-Na-Zin Wilderness Area of New Mexico and its predatory nature. This dinosaur, sometimes referred to colloquially as the "Bisti Beast," is closely related to tyrannosaurids, and its fossils provide valuable insights into the diversity and evolution of this iconic group of predators.
Discovery and Classification
Fossils attributed to Bistahieversor were first described in the early 1990s. Following re-examination of these specimens, paleontologists Thomas Carr and Thomas Williamson formally identified and named the genus and species Bistahieversor sealeyi in 2010. Its classification within Eutyrannosauria has seen varied interpretations, with some studies placing it as a basal member, distinct from the more derived tyrannosaurines, while others suggest it belongs to the tyrannosaurine clade Teratophoneini or even basal Albertosaurinae.
Description and Paleobiology
Bistahieversor is estimated to have reached an adult length of approximately 9 meters (30 feet) and weighed at least a ton, with some estimates reaching up to 3.3 metric tons. Anatomically, it possessed a deep snout, 64 teeth, and unique features such as an extra opening above the eye and a keel along the lower jaw. Studies of its endocranial morphology reveal a heightened sense of smell, increased agility, sophisticated gaze stabilization, and binocular vision, all adaptations that would have aided it in hunting. The presence of a complex joint at its "forehead" suggests a mechanism for stabilizing the skull during activity.
Habitat and Temporal Range
Fossils of Bistahieversor have been recovered from the Hunter Wash Member of the Kirtland Formation and the underlying Fossil Forest member of the Fruitland Formation in New Mexico. These formations date Bistahieversor to approximately 75.5 to 74.5 million years ago, during the Campanian age of the Late Cretaceous. The geographical barriers present during this time, such as the nascent Rocky Mountains, may have played a role in isolating this southern population from more northern tyrannosaurs.
Source: Wikipedia ↗
Frequently Asked Questions
What does the name Bistahieversor mean?
The name Bistahieversor is derived from the Navajo word "Bistahí," meaning "place of the adobe formations," referring to the Bisti/De-Na-Zin Wilderness Area where it was found. The second part of the name, "eversor," is Latin for "destroyer."
When did Bistahieversor live?
Bistahieversor lived during the Late Cretaceous period, specifically from approximately 75.5 to 74.5 million years ago, during the Campanian age.
Where were Bistahieversor fossils discovered?
Fossils of Bistahieversor have been discovered in New Mexico, primarily within the Hunter Wash Member of the Kirtland Formation and the Fossil Forest member of the Fruitland Formation.
What were the physical characteristics of Bistahieversor?
Adult Bistahieversor are estimated to have reached about 9 meters (30 ft) in length and weighed at least a ton. It had a deep snout, 64 teeth, an extra opening above the eye, and a keel along the lower jaw.
What did Bistahieversor eat?
As a eutyrannosaurian theropod closely related to tyrannosaurids, Bistahieversor was a carnivore, preying on other animals.
How was Bistahieversor discovered and named?
Initial remains were described as Aublysodon, then later suggested to be Daspletosaurus. In 2010, Thomas Carr and Thomas Williamson formally described it as a new genus and species, Bistahieversor sealeyi, based on re-examined specimens.
Related Dinosaur species
Daemonosaurus
Daemonosaurus is an extinct genus of dinosaur from the Late Triassic period, known from a single skull and neck fossil discovered in New Mexico. It possessed an unusual short skull with large, fang-like teeth, and its exact placement within dinosaur phylogeny is debated, possibly representing a basal theropod or basal saurischian.
Abelisaurus
Abelisaurus was a genus of predatory theropod dinosaur that lived in South America during the Late Cretaceous Period. Known primarily from a partial skull, it is estimated to have been a bipedal carnivore reaching around 7.4 meters in length.
Acheroraptor
Acheroraptor is an extinct genus of dromaeosaurid theropod dinosaur that lived in North America during the Late Cretaceous period. It is known from fossil remains discovered in the Hell Creek Formation of Montana, United States. Acheroraptor is notable for being one of the geologically youngest dromaeosaurids, existing just before the Cretaceous-Paleogene extinction event.