Deinonychus dy-non-i-kəs; Greek: δεινός, 'terrible' and ὄνυξ, genitive ὄνυχος 'claw') was a genus of carnivorous
dromaeosaurid dinosaur. There is one described species, Deinonychus antirrhopus. This 3.4 meter (11 ft) long dinosaur lived
during the early Cretaceous Period, about 115–108 million years ago (from the mid-Aptian to early Albian stages). Fossils
have been recovered from the U.S. states of Montana, Wyoming, and Oklahoma, in rocks of the Cloverly Formation and Antlers
Formation, though teeth that may belong to Deinonychus have been found much farther east in Maryland.
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