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Latest Deinonychus Stories

Bird Fingers: Understanding Evolution Of Wings In Our Avian Friends
2014-01-08 08:29:58

Brett Smith for redOrbit.com - Your Universe Online While birds’ three fingers appear analogous to our own thumb, index and middle fingers, embryonic evidence has shown that the “pinky” side of a bird’s claw develops first, which some theories have said is evidence of the three bird fingers being an index, middle and ring finger. According to a new study published in the Journal of Experimental Zoology, as dinosaurs evolved into birds, they actually lost their pinky and thumb,...

Image 1 - Killer Claws Help Provide New Theory On Evolution Of Flight
2011-12-16 03:57:20

New research from Montana State University's Museum of the Rockies has revealed how dinosaurs like Velociraptor and Deinonychus used their famous killer claws, leading to a new hypothesis on the evolution of flight in birds. In a paper published Dec. 14 in PLoS ONE, MSU researchers Denver W. Fowler, Elizabeth A. Freedman, John B. Scannella and Robert E. Kambic (now at Brown University in Rhode Island), describe how comparing modern birds of prey helped develop a new behavior model for...

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2008-12-18 08:55:44

On Tuesday, researchers reported the discovery of a new species of raptor in Argentina, one of the largest of its kind. The creature would have weighed nearly 800 pounds and been 15 feet long with very short arms, resembling a Tyrannosaurus. The raptor was a slender, two-legged hunter.  The creature has gained recent popularity through books and movies like Jurassic Park. The discovery brings new information into the discussion of the evolution of dromaeosaurids, which were intelligent,...


Latest Deinonychus Reference Libraries

2014-04-22 14:47:42

John Harold Ostrom (February 18, 1928 – July 16, 2005) was an American Paleontologist who was greatly influential in the revival of scientific research on Dinosaurs. He is best known for demonstrating that Dinosaurs were less like contemporary reptiles but more closely related to large, flightless birds like the ostrich – a theory that holds its ground in the paleontological community to this day. John Ostrom was born and raised in Schenectady, New York. His father was a physician, and...

Velociraptor
2013-04-28 14:44:15

Velociraptor, meaning “swift seizer” is a genus of dromaeosaurid theropod dinosaur that lived about 75 to 71 million years ago during the later part of the Cretaceous Period. There are two species that are presently recognized. The type species is V. mongoliensis; fossils of this particular species have been uncovered in Mongolia. A second species, V. osmolskae, it was named in 2008 for some skull material from Inner Mongolia, China. They are smaller than other dromaeosaurids such as...

Deinonychus
2013-02-12 13:34:53

Deinonychus is a genus of carnivorous dromaeosaurid dinosaurs. There’s one described species, Deinonychus antirrhopus. These dinosaurs, which were capable of growing to be 11 ft long, lived during the early Cretaceous Period, around 115 to 108 million years ago. Fossils have been uncovered from the U.S states of Wyoming, Montana, and Oklahoma, in rocks of the Cloverly Formation and Antlers Formation, though teeth that might belong to Deinonychus have been found much farther east in...

Tenontosaurus
2013-01-29 09:53:30

Image Caption: Head of Tenontosaurus, Institut de paléontologie humaine, Paris, France. Credit: Rémih/Wikipedia (CC BY-SA 3.0) Tenontosaurus, meaning “sinew lizard”, is a genus of medium to large sized ornithopod dinosaur. The genus is known from the late Aptian to Albian ages of the middle Cretaceious period sediments of western North America, dating roughly between 115 to 108 million years ago. It was formerly thought to be a ‘hypsilophodont’, but since Hypsilophodontia is no...

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2011-04-11 17:00:22

Tianyuraptor, meaning "Tianyu thief," is a genus of dromaeosaurid dinosaur from the Barremian and Aptian stages of the Early Cretaceous Period (129 to 122 million years ago). It was discovered in western Liaoning, China in the Dawangzhangzi Bed of the Yixian Formation. While similar to other dromaeosaurids that have been discovered in Liaoning, it is somewhat more primitive. The type specimen, which was described in 2009, shows features not previously known in Northern Hemisphere...

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Word of the Day
malpais
  • The ragged surface of a lava-flow.
'Malpais' translates from Spanish as 'bad land.'