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Im playing w my toy waiting 4 your raging hard cock. Try and stop me! I've reached my "prime" and i want sex all the time. An intelligent, hard working white man who takes pride in his appearance, dresses trendy and pays attention to his shoes. This strategy would also potentially have allowed the prey to recover and be fed upon in a similar way later. When compared with Tyrannosaurus and the therizinosaurid Erlikosaurus in the same study, it was found that Allosaurus had a wider gape than either; the animal was capable of opening its jaws to a 92 degree angle at maximum.

The findings also indicate that large carnivorous dinosaurs, like modern carnivores, had wider jaw gapes than herbivores. 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. This would have allowed the animal to make rapid and forceful vertical movements with the skull. The authors found that vertical strikes as proposed by Bakker and Rayfield are consistent with the animal's capabilities.

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They also found that the animal probably processed carcasses by vertical movements in a similar manner to falcons , such as kestrels: This differs from the prey-handling envisioned for tyrannosaurids, which probably tore flesh with lateral shakes of the skull, similar to crocodilians. Other aspects of feeding include the eyes, arms, and legs. As with crocodilians, this may have been enough to judge prey distance and time attacks.

A new paper on the cranio-dental morphology of Allosaurus and how it worked has deemed the hatchet jaw attack unlikely, reinterpreting the unusually wide gape as an adaptation to allow Allosaurus to deliver a muscle-driven bite to large prey, with the weaker jaw muscles being a trade-off to allow for the widened gape. It has been speculated since the s that Allosaurus preyed on sauropods and other large dinosaurs by hunting in groups.

Bakker has extended social behavior to parental care, and has interpreted shed allosaur teeth and chewed bones of large prey animals as evidence that adult allosaurs brought food to lairs for their young to eat until they were grown, and prevented other carnivores from scavenging on the food. Such head-biting may have been a way to establish dominance in a pack or to settle territorial disputes. 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.

The study in question noted that cooperative hunting of prey much larger than an individual predator, as is commonly inferred for theropod dinosaurs, is rare among vertebrates in general, and modern diapsid carnivores including lizards, crocodiles, and birds rarely cooperate to hunt in such a way. Instead, they are typically territorial and will kill and cannibalize intruders of the same species, and will also do the same to smaller individuals that attempt to eat before they do when aggregated at feeding sites.

According to this interpretation, the accumulation of remains of multiple Allosaurus individuals at the same site, e. This could explain the high proportion of juvenile and subadult allosaurs present, as juveniles and subadults are disproportionally killed at modern group feeding sites of animals like crocodiles and Komodo dragons. The same interpretation applies to Bakker's lair sites. The brain of Allosaurus , as interpreted from spiral CT scanning of an endocast , was more consistent with crocodilian brains than those of the other living archosaurs , birds.

The structure of the vestibular apparatus indicates that the skull was held nearly horizontal, as opposed to strongly tipped up or down. The structure of the inner ear was like that of a crocodilian, and so Allosaurus probably could have heard lower frequencies best, and would have had trouble with subtle sounds. The olfactory bulbs were large and seem to have been well suited for detecting odors, although the area for evaluating smells was relatively small. In , Bruce Rothschild and others published a study examining evidence for stress fractures and tendon avulsions in theropod dinosaurs and the implications for their behavior.

Since stress fractures are caused by repeated trauma rather than singular events they are more likely to be caused by the behavior of the animal than other kinds of injury. Stress fractures and tendon avulsions occurring in the forelimb have special behavioral significance since while injuries to the feet could be caused by running or migration , resistant prey items are the most probable source of injuries to the hand.

Allosaurus was one of only two theropods examined in the study to exhibit a tendon avulsion, and in both cases the avulsion occurred on the forelimb. When the researchers looked for stress fractures, they found that Allosaurus had a significantly greater number of stress fractures than Albertosaurus , Ornithomimus or Archaeornithomimus.

Of the 47 hand bones the researchers studied, 3 were found to contain stress fractures. Of the feet, bones were studied and 17 found to have stress fractures. 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. Since the lower end of the third metatarsal would have contacted the ground first while an allosaur was running it would have borne the most stress.

If the allosaurs' stress fractures were caused by damage accumulating while walking or running this bone should have experience more stress fractures than the others. The lack of such a bias in the examined Allosaurus fossils indicates an origin for the stress fractures from a source other than running. The authors conclude that these fractures occurred during interaction with prey, like an allosaur trying to hold struggling prey with its feet. The abundance of stress fractures and avulsion injuries in Allosaurus provide evidence for "very active" predation-based rather than scavenging diets.

The left scapula and fibula of an Allosaurus fragilis specimen catalogued as USNM are both pathological, both probably due to healed fractures. The specimen USNM preserved several pathological gastralia which preserve evidence of healed fractures near their middle. Some of the fractures were poorly healed and "formed pseudoarthroses". A specimen with a fractured rib was recovered from the Cleveland-Lloyd Quarry. Another specimen had fractured ribs and fused vertebrae near the end of the tail.

An apparent subadult male Allosaurus fragilis was reported to have extensive pathologies, with a total of fourteen separate injuries. The specimen MOR had pathologies on five ribs, the sixth neck vertebra the third eighth and thirteenth back vertebrae, the second tail vertebra and its chevron, the gastralia right scapula, manual phalanx I left ilium metatarsals III and V, the first phalanx of the third toe and the third phalanx of the second. The ilium had "a large hole The near end of the first phalanx of the third toe was afflicted by an involucrum.

Other pathologies reported in Allosaurus include: Willow breaks in two ribs. Healed fractures in the humerus and radius. Distortion of joint surfaces in the foot possibly due to osteoarthritis or developmental issues.

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Osteopetrosis along the endosteal surface of a tibia. Coossification of vertebral centra near the end of the tail. Amputation of a chevron and foot bone, both possibly a result of bites. Lesions similar to those caused by osteomyelitis in two scapulae. Bone spurs in a premaxilla , ungual , and two metacarpals. Exostosis in a pedal phalanx possibly attributable to an infectious disease. A metacarpal with a round depressed fracture. The Morrison Formation has been a rich fossil hunting ground.

The flora of the period has been revealed by fossils of green algae , fungi , mosses , horsetails , ferns, cycads , ginkgoes , and several families of conifers.

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Animal fossils discovered include bivalves , snails , ray-finned fishes , frogs , salamanders , turtles , sphenodonts , lizards , terrestrial and aquatic crocodylomorphans , several species of pterosaur , numerous dinosaur species, and early mammals such as docodonts , multituberculates , symmetrodonts , and triconodonts. Dinosaurs known from the Morrison include the theropods Ceratosaurus , Ornitholestes , Tanycolagreus , and Torvosaurus , the sauropods Haplocanthosaurus , Camarasaurus , Cathetosaurus , Brachiosaurus , Suuwassea , Apatosaurus , Brontosaurus , Barosaurus , Diplodocus , Supersaurus , and Amphicoelias , and the ornithischians Camptosaurus , Dryosaurus , and Stegosaurus.

Many of the dinosaurs of the Morrison Formation are the same genera as those seen in Portuguese rocks mainly Allosaurus , Ceratosaurus , Torvosaurus , and Stegosaurus , or have a close counterpart Brachiosaurus and Lusotitan , Camptosaurus and Draconyx. Allosaurus coexisted with fellow large theropods Ceratosaurus and Torvosaurus in both the United States and Portugal.

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Ceratosaurs and torvosaurs may have preferred to be active around waterways, and had lower, thinner bodies that would have given them an advantage in forest and underbrush terrains, whereas allosaurs were more compact, with longer legs, faster but less maneuverable, and seem to have preferred dry floodplains.

The location of the bone in the body along the bottom margin of the torso and partially shielded by the legs , and the fact that it was among the most massive in the skeleton, indicates that the Allosaurus was being scavenged. From Wikipedia, the free encyclopedia. Utah Geological Survey Miscellaneous Publication Archived from the original on 17 January Retrieved 8 September Utah Geological Survey Bulletin 2nd ed.

Quantifying the effect of soft tissue and osteological unknowns on mass predictions for Allosaurus Dinosauria: Archived from the original on 25 December Retrieved 13 December Museum of Northern Arizona Bulletin. Journal of Vertebrate Paleontology. Predatory Dinosaurs of the World. The Illustrated Encyclopedia of Dinosaurs: Paul interpret the count as ten neck and thirteen back vertebrae. In Weishampel David B. The Dinosauria 2nd ed. University of California Press. Zoological Journal of the Linnean Society. Archived from the original PDF on 25 October Retrieved 25 October Bulletin of the United States National Museum.

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