| Bistahieversor | |
|---|---|
| File:Bistibeast.jpg | |
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Kingdom: |
Animalia |
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Phylum: |
Chordata |
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Class: |
Reptilia |
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Superorder: |
Dinosauria |
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Order: |
Saurischia |
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Suborder: |
Theropoda |
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Superfamily: |
†Tyrannosauroidea |
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Family: |
Incertae sedis |
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Genus: |
†Bistahieversor |
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Species: |
†B. sealeyi (type) |
Bistahieversor was a genus of basal tyrannosaurid that lived about 75 million years ago during the Campanian stage of Late Cretaceous. Fossils have been found in the Kirtland Formation of New Mexico.
Description[]
Bistahieversor, in life, would have measured 9 meters (30 feet) in length and weighed around a ton. Its skull had a deep snout, marking the beginning of the deep snouts seen in the family Tyrannosauridae. It also a keel along the mandible, possessing a total 64 teeth. Unusual to tyrannosaurs, Bistahieversor had a opening above its its eyes, possibly to accommodate and air sac, thus lightening the skull's bulk. Like most tyrannosaurids, the head would have been perched on an S-shaped neck. The forelimbs would have been reduced to counterbalance the head's mass. The tail would have been held erect and the vertebrae parallel to the ground to balance the body and distribute the overall mass to the hips.
Discovery[]
The fist remains, found in 1990, now assigned to the genus Bistahievesor, were initially assigned to to the genus Aublysodon. A reexamination suggested that the partial skeleton belonged to a new species of Daspletosaurus. However, recent and more thorough description categorized it as a new genus and species all together. It was coined Bistsahieversor sealeyi.
Classification[]
Bistahieversor is a basal member of the superfamily Tyrannosauroidea. It is believed to have been a basal ancestor, or at least similar to the family Tyrannosauridae.
