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Deinonychus skeleton
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Deinonychus skeleton
A fast moving pretador that lived duirng the Lower Cretaceous period, 120 to 110 million years ago. Fossils have been found in the USA, being first described by Ostrom, 1969. Illustration by Jo Konopelko
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Archosaur Archosauria Archosauriformes Archosauromorpha Bone Carnivore Claw Coelurosaur Coelurosauria Cretaceous Cretaceous Period Deinonychosauria Deinonychus Diapsid Diapsida Dinosaur Dinosauria Dinosauromorpha Dinosaurs Dromaeosaur Dromaeosauridae Dromaeosauroidea Eudromaeosauria Extinct Hunter
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Deinonychus: The Agile Hunter of the Early Cretaceous Period This illustration showcases the anatomy of Deinonychus, a dromaeosaurid dinosaur that roamed the Earth during the Lower Cretaceous period, approximately 120 to 110 million years ago. Deinonychus, meaning "terrible claw," was a fast-moving predator, with a body structure that resembled that of modern-day birds. Its skeleton, depicted in this illustration, reveals its hunter's anatomy, including its distinctive enlarged, sickle-shaped claw on its second toe. First described by John Ostrom in 1969, fossils of Deinonychus have been discovered primarily in the United States. This dinosaur was part of the larger group of archosauria, which includes both dinosaurs and their ancestors. More specifically, it belonged to the diapsida subclass, characterized by two openings in the skull for the eyes and nasal cavity. Deinonychus was also a member of the dinosauria, a group of reptiles characterized by their hollow bones and bipedal locomotion. Within the dinosauria, Deinonychus was classified as a coelurosaur, a theropod dinosaur characterized by its coelum, a large, open cavity in the pelvis. Deinonychus was further classified as a dromaeosaur, a subgroup of coelurosaurs characterized by their small, sickle-shaped claws on their hindlimbs. Deinonychus was a carnivorous dinosaur, likely hunting in packs for prey. Its anatomy, with its powerful legs and sharp claws, was well-suited for agile, quick movements, making it an efficient and deadly hunter. This illustration provides a glimpse into the anatomy and appearance of this fascinating early dinosaur, offering a window into the diverse and complex world of the Cretaceous period.
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