Predatory dinosaurs in the upper Jurassic had to gnaw the bones of relatives

Paleontologists have discovered in your career Mygatt-Moore, Colorado, bones of the upper Jurassic predatory theropod of allosaurus with traces of representatives of the same or similar types to them, reported in PLoS ONE. This allows for the first time to suggest that allosaurus was engaged in cannibalism. They were probably eaten the bones of fallen relatives or even hunted them for lack of food.

Teeth marks on the bones of the animals allow you to figure out who ate them and how actively fished and ate fresh meat or have eaten what is left after other carnivores. This is true for fresh remains, and paleontological material. If at one point find many remains of about the same age, the bone damage can be aware of the kinds included in the local ecosystem and how they were arranged in her food chain.

American paleontologists led by Stephanie Drumheller (Stephanie K. Drumheller) from the University of Tennessee and Julia McHugh (Julia B. McHugh) from Colorado Mesa University have determined the number and nature of traces on fossil bones 2368 age 152,18 ± 0,29 million years from a career Mygatt-Moore Western Colorado. Apparently, Mygatt Mur in upper Jurassic was periodically drying up the pond. Reptiles in addition to dinosaurs there were little things: turtles and crocodylomorpha devoured among the findings was almost non-existent. Almost was not, and fish, and aquatic invertebrates. However, the remains of plants found there quite a lot.

Teeth marks noticed on the bones of 684 2368 (about 29 percent of the total). This is substantially more than in other dinosaur communities of the same age: they usually share the bones with bite marks does not exceed 14 percent. The majority (70.25 percent of 684) of damaged bones belonged to sauropods — herbivorous dinosaurs that feed the larger predators. However, scratches, nicks and other types of traces found on the bones themselves major predators — the theropod in the first place of allosaurus. Share their bones, damaged someone’s teeth amounted to 17.23 percent. Used to find them very rarely it is believed that the theropods were rather softer and more nutritious parts of the carcass, primarily meat, although ceratosaur can sometimes to feed on carrion and pick up what is left after a meal of larger predators.

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