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Acrocanthosaurus atokensis file
Translation: Atoka tall spined lizard
Description: Carnivore, bipedal
Height: 5.5 meters
Length: 11.2 meters
Weight: 5,000 - 7,000 kg
The Acrocanthosaurus atokensis It is one of the few known allosaurs in North America, fragments of remains being found in Texas and Oklahoma. His back possessed spines up to 60 cm tall in large specimens.
Unlike the spines on other dinosaurs, those of the Acrocanthosaurus were thickly covered in muscle and it is believed that they could serve for communication, fat storage or thermoregulation (Compare Spinosaurus).
It is estimated that Acrocanthosaurus could run at a speed of 40 km / h.
The Acrocanthosaurus was one of the largest theropods known to have existed. The largest known specimen (NCSM 14345) is estimated to have measured 11.5 meters from snout to tip of tail and weighed between 5,000 and 7,000 kilograms.
The Acrocanthosaurus skull, like most allosauroids, it was long, short, and narrow, and its jaws were very powerful. Proof of this is that 19 teeth were aligned on each side of his upper jaw, but the count of the lower jaw is unknown.
The most notable feature of Acrocanthosaurus it was its row of tall neural spines, located on the vertebrae of the neck, back, hips and upper tail, which could measure more than 2.5 times the height of the vertebrae.
Other dinosaurs also had tall spines on their backs, sometimes much taller than those of the Acrocanthosaurus, such as the Spinosaurus, which had spines almost 2 meters high, about 11 times taller than the bodies of its vertebrae.
The lower spines of Acrocanthosaurus they were encased in powerful muscles like those of the modern bison, probably forming a high, thick ridge on their back.
Their function remains unknown, although they may have been involved in communication, fat storage, or temperature control.
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