of allosaurus

The stress fractures in the foot bones “were distributed to the proximal phalanges ” and occurred across all three weight-bearing toes in “statistically indistinguishable” numbers. American Journal of Science. Proceedings of the Academy of Natural Sciences of Philadelphia. This request is currently pending review. Although Allosaurus may have hunted in packs, [] it has been argued that Allosaurus and other theropods had largely aggressive interactions instead of cooperative interactions with other members of their own species.

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Archived from the original on 19 March aloosaurus Bone spurs in a premaxillaungualand two metacarpals. Introduction to the Study of Dinosaurs. Paul interpret the count as ten neck and thirteen back vertebrae. A biomechanical study published in by Eric Snively and colleagues found that Allosaurus had an unusually low attachment point on the skull for the longissimus capitis superficialis neck muscle compared to other theropods such as Tyrannosaurus.

Evolutionary clues from spiral computed tomography allisaurus an endocast” PDF. Nineteen bones were broken or showed signs of infectionwhich probably contributed to the animal’s death Hanna This skeleton was initially discovered by a Swiss team, led by Kirby Siber.

Allosaurus pictures and facts

Theropods were a group of bipedal saurischian dinosaurs that first appear during the Late Triassic about million years ago and were the sole large terrestrial carnivores from the Early Jurassic until the end of or Cretaceousabout 65 million years ago.


The name ” Allosaurus” means “different lizard” alluding to its unique concave vertebrae at the time of its discovery. At the time of writing the only universally recognised species of Allosaurus is the type species A. Chure, Wyomingraptor Bakker, “Camptonotus” amplus Marsh, The multiplicity of early names complicated later research, with the situation compounded by the terse descriptions provided by Marsh and Cope.


Allosaurus was a carnivore meat eater and featured big, sharp teeth that had edges like saws. Allosaurus lived around million years ago in the late Jurassic Period.

Articles from Britannica Encyclopedias for elementary and high school students. Allosaurus Facts for Kids.

This article abides allosaufus terms of the Creative Commons CC-by-sa 3. Juvenile Allosaurus allosaurue on their longer limb bones that were better adapted to running in order to hunt small vertebrates. You may find it helpful to search within the site to see how similar or related subjects are covered. There were allegations of spying, stealing workers, stealing fossils, treaty violations, and bribery.

Allosaurus Facts for Kids – Interesting Dinosaur Information

Allosaurus shared the landscape with several genera of giant sauropods such as ApatosaurusDiplodocusand Camarasaurus as well as other herbivores such as Stegosaurus and Camptosaurusall of which may have been potential prey. Archived from the original on 17 January Osteopetrosis along the endosteal surface of a tibia. Coossification of vertebral centra near the end of the tail.


Its presence in the Allosaurus individual has been used to establish sex and show it had reached reproductive age. There are currently four valid and one undescribed species of Allosaurus A. Facts About the ‘Different Lizard’. Because of this, some researchers believe the dinosaur may have used its skull as a hatchet, slamming its upper jaws into its prey and then tearing out flesh with its slashing teeth.

Glut listed it as a species of Allosaurus[4] it is now considered a dubious ceratosaurian related to Ceratosaurus.

It was known for over half of the 20th century as Antrodemusbut a study of the copious remains from the Cleveland-Lloyd Dinosaur Quarry brought the name ” Allosaurus” back to prominence and established it as one of the best-known dinosaurs. The Allosaurus was a large dinosaur that lived around million years ago. Retrieved 25 October Because of this, several scientists have interpreted the type specimen as potentially dubious, and thus the genus Allosaurus itself or at least the species A. Gustav Fischer Verlag, Stuttgart: Distortion of joint surfaces in the foot possibly due to osteoarthritis or developmental issues.