Deinonychus


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Deinonychus

(dī'nənī`kəs) [Gr.,=terrible claw], swift bipedal carnivorous dinosaurdinosaur
[Gr., = terrible lizard], extinct land reptile of the Mesozoic era. The dinosaurs, which were egg-laying animals, ranged in length from 2 1-2 ft (91 cm) to about 127 ft (39 m).
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 of the early Cretaceous period, approximately 119–93 million years ago. Fossil specimens have been discovered in Montana and Wyoming. Adults were around 10 ft (2.5 m) from head to tail and 1 ft (3 m) high. The second toe of each three-toed foot was modified into a long sickle-shaped claw, and the hands, each finger of which also ended in a claw, were adapted to grabbing prey. Deinonychus is thought to have been a very fast-moving predator. It belongs to the group of saurischian theropods [Gr., = beast feet] that includes TyrannosaurusTyrannosaurus
[Gr.,=tyrant lizard], member of a family, Tyrannosauridae, of bipedal carnivorous saurischian dinosaurs characterized by having strong hind limbs, a muscular tail, and short forelimbs. Tyrannosaurids are theropods, having three toes on the hind feet.
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, VelociraptorVelociraptor
[Gr.,=swift robber], swift bipedal carnivorous dinosaur of the late Cretaceous period. It was relatively small, being approximately 6 ft (1.8 m) long. It was similar to Deinonychus
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, and living birds.
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References in periodicals archive ?
Influenced by "Jurassic Park," the public may think that Deinonychus hunt in groups.
Velociraptor and Deinonychus also have a very short, stout metatarsus, suggesting that they had great strength but wouldn't have been very fast runners," he said.
The raptor Deinonychus, with its mix of bird and dinosaur features, helps tell the story of how dinosaurs evolved into birds.
The researchers plunged the foot into a fresh pig carcass at speeds comparable to those expected during Deinonychus attacks.
Despite having a sheath 40 times as strong as the keratin that likely enveloped a Deinonychus claw, the model claw didn't rip a gash through the flesh.
On a new specimen of the Lower Cretaceous theropod dinosaur Deinonychus antirrhopus.
Yesterday's winner Deinonychus was trained by Leon Phillips in Spain last summer, running several times at San Sebastian before joining William Knight.
The display is one of Northern Ireland's biggest ever dinosaur exhibitions and has a T-Rex who stands four metres tall beside an agile Deinonychus for kids to look at.
These newest additions include a 15-foot mother Maiasaura, a duck-billed dinosaur, nurturing her nest of hatching eggs and babies; an Albertosaurus, a close relative to the Tyrannosaurus rex; an Euoplocephalus, an armored dinosaur; 22-foot Tenontosaurus, a dinosaur with a lizardlike tail; two dueling 13-foot Pachycephalosaurus and a pack of flesh-eating, warm-blooded Deinonychus attacking a Tenontosaurus.
Ostrom of Yale University discovered a sickle-clawed terror called Deinonychus.
His 1969 drawing of a running Deinonychus (or "terrible claw," for the lethal, sickle-shaped claws on its feet) shows a "very sleek, fast-moving animal," says Sylvia Czerkas.