Acrocanthosaurus
Acrocanthosaurus Toe Claw cast replica
Name: Acrocanthosaurus (High spined lizard).
Phonetic: Ak-row-can-fo-sore-us.
Named By: John Willis Stovall & Wann Langston, Jr. - 1950.
Classification: Chordata, Reptilia, Dinosauria, Saurischia, Theropoda, Carcharodontosauridae.
Species: A. atokensis (type).
Type: Carnivore.
Size: Up to 11.5 meters long.
Known locations: USA, Oklahoma, Antlers Formation, and the Texas, Twin Mountains Formation. Some specimens are from other parts of the US.
This is a replica cast from the claw of an Acrocanthosaurus.
Age Early Cretaceous
Acrocanthosaurus ('high-spined lizard') is a genus of carcharodontosaurid dinosaur that existed in what is now North America during the Aptian and early Albian stages of the Early Cretaceous,. Like most dinosaur genera, 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, a tibia, and vertebrae attributed to Acrocanthosaurus have been found as far east as Maryland, suggesting a continent-wide range.
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, with the largest known specimen reaching 11–11.5 meters (36–38 ft) in length and weighing approximately 4.4–6.6 metric tons (4.9–7.3 short tons). Large theropod footprints discovered in Texas may have been made by Acrocanthosaurus, although there is no direct association with skeletal remains.
Recent discoveries have elucidated many details of its anatomy, allowing for specialized studies focusing on its brain structure and forelimb function. Acrocanthosaurus was the largest theropod in its ecosystem and likely an apex predator that preyed on sauropods, ornithopods, and ankylosaurs.
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