- Pronunciation: (Bis-Tah-Hee-Ever-Sore)
- Meaning: "Bistahi Destroyer"
- Length: 30ft
- Height: 10ft
- Weight: 1 ton
- Diet: Carnivorous
- Time: 74 MYA
- Region: North America (New Mexico)
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| Art and Copyright belongs to Robert; SADistiknight on DeviantArt |
Bistahieversor, which translates to
“Bistahi Destroyer”, comes from the Kirtland Formation of New Mexico. It
represents an unusual stage in the evolution of Tyrannosaurs, due to the shape
of its head, whole above its eye socket, and slim, yet strong build.
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| Original Skull Material (Public Domain) |
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| Reconstructed Skull (Public Domain) |
Originally found in 1990, the name
Bistahieversor never existed in its place existed Aublysodon. However, more
material uncovered in 1992, including a partial skeleton and skull, revealed
more of the animal’s anatomy enough to differentiate it from the genus
Aublysodon. Then, again more material was uncovered in the Bisti wilderness of
New Mexico in 1998 to further differentiate it from its initial genus. It was
not until 2010 that the animal was renamed Bistahieversor.
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| Bistahieversor Reconstruction (Art and Copyright belongs to KindEdmarka on DeviantArt) |
Bistahieversor contained features
of more advanced Tyrannosaurs as well as more derived genus. Its skull was
unusually deep in contrast to Tyrannosaurs that appeared later than it and
after it, which suggests that the deepness of the skull is not a feature that
evolved in advancement of the family but rather a characteristic that evolved
due to environmental pressures. Bistahieversor has been placed in the subfamily
Tyrannosaurinae, which consists of; Daspletosaurus, Teratophoneus, Lythronax,
and Nanuqsaurus. The material is from both adolescent and adult individuals and
as such, the growth stage can be roughly inferred, which is different from many
other Tyrannosaur genus. The skull holds a whole above the eye socket found
only in the adult skulls and was absent in the juvenile skull, which suggests
that it only appeared in adulthood. It is thought that the whole would have
held an air sac in life to reduce the skull’s weight. Bistahieversor measured
an approximate 30 feet long and 10 feet tall, which reached the similar sizes
of Daspletosaurus.
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| (Art and Copyright belongs to Raul Linia) |
This find has elucidated a new
predator of the southern hemisphere that had not been previously known, and
represents a new spot in the ecosystem. Only more finds will help outline the
animal’s hunting habits and perhaps give more insight into how the animal
lived.
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| (Art and Copyright belongs to PrehistoricWildlife) |
Works Cited:
"Bistahieversor." Bistahieversor. Prehistoricwildlife, n.d. Web. 12 Jan. 2016.
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