Genus: Acrocanthosaurus (“High-spined Lizard”)
Species: A. atokensis
As a large meat-eater, Acrocanthosaurus was likely an apex predator that hunted other dinosaurs, including possibly long-necked sauropods like Astrodon and duck-billed Tenontosaurus.
The function of the ridge along its back remains a mystery. It may have aided in communication or display, or it possibly could have been used for fat storage, similar to the hump of a camel.
Acrocanthosaurus was a two-legged meat-eating dinosaur. It had a long and low skull with lots of sharp teeth, similar to its relatives Carcharodontosaurus and Giganotosaurus. Its most distinguishing feature were the tall neural spines along its neck and back. These likely supported a high, thick ridge of muscle.
SIZE: 38 feet (11.5 meters)
WEIGHT: 6.3 to 6.8 short tons (5.7 to 6.2 metric tons)
Acrocanthosaurus lived in the Early Cretaceous Period, from125 to 100 million years ago, in what is now North America. Its remains are mainly known from Oklahoma, Texas and Wyoming, though it may have had a much larger range.
Its habitat was a large coastal floodplain, and it may have frequented many different environments. In addition to long-necked sauropods and duck-billed ornithopods, it also shared a habitat with the smaller predator Deinonychus. Due to differences in their size, they likely did not compete with one another.