Acrocanthosaurus

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phylum Chordata Acrocanthosaurus (meaning "high-spined lizard") is a genus of theropod dinosaur that existed in what is now North America during the Early Cretaceous. Acrocanthosaurus contains only a single species, A. atokensis. Its fossil remains are found mainly in the U.S. states of Oklahoma, Texas, and Wyoming, although teeth attributed to Acrocanthosaurus have been found as far east as Maryland.

Acrocanthosaurus was a bipedal predator. As the name suggests, it is best known for the high neural spines on many of its vertebrae, which most likely supported a ridge of muscle over the animal's neck, back and hips. Acrocanthosaurus was one of the largest theropods, approaching 12 meters (40 ft) in length, and weighing up to 6.2 tonnes (6.8 short tons).
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clade Diapsida
infraclass Dinosauria
order Saurischia
Suborder Theropoda
family †Carcharodontosauridae
genus †Acrocanthosaurus
species †A. atokensis
Period Early Cretaceous

Acrocanthosaurus skeleton

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