Dromeosaur Raptor Dinosaur Tooth, Vertebrae, Limb Bone Fossil LDB #1274 15o
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Dromeosaur Raptor Dinosaur Tooth, Vertebrae, Limb Bone Fossil LDB #1274 15o:
$99.99
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This is a nice lot of fossils from the Raptor dinosaur, \"Dromeosaur\" . There is a limb bone, a vertebrae and a tooth in the set. The fossils are displayed beautifully in a glass-topped Riker mount display box. The limb bone measures 2 1/2 inches in length. The vertebrae is 3/4 inch in length, and the tooth is 1 inch long. This dinosaur was an agile predator and scavenger with small, serrated teeth. Some raptors are thought to have had feathers and may have hunted in packs. These fossils are from the Cretaceous period, around 100 million years ago. They were found S. of Taouz, in the Moroccan Sahara.
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Temporal range: Middle Jurassic – Late Cretaceous, 164–65.5 Ma PreЄЄOSDCPTJKPgNDeinonychus antirrhopus (large) and Buitreraptor gonzalezorum (small), Field Museum of Natural HistoryScientific classification & Brown, & Brown, 1922Type speciesDromaeosaurus albertensis
Matthew & Brown,
Itemiridae Kurzanov, 1976
Rahonavidae Livezey & Zusi, 2007
Unenlagiidae Agnolin & Novas, 2011
Dromaeosauridae is a family of bird-like theropod dinosaurs. They were small- to medium-sized feathered carnivores that flourished in the Cretaceous Period. The name Dromaeosauridae means \'running lizards\', from Greek dromeus (δρομευς) meaning \'runner\' and sauros (σαυρος) meaning \'lizard\'. In informal usage they are often called raptors[3] (after Velociraptor), a term popularized by the film Jurassic Park; a few types include the term \"raptor\" directly in their name and have come to emphasize their supposed bird-like habits.
Dromaeosaurid fossils have been found in North America, Europe, Africa, Japan, China, Mongolia, Madagascar, Argentina, and Antarctica.[4] They first appeared in the mid-Jurassic Period (late Bathonian stage, about 164 million years ago) and survived until the end of the Cretaceous (Maastrichtian stage, 65.5 ma), existing for over 100 million years, up until the Cretaceous–Paleogene extinction event. The presence of dromaeosaurs as early as the Middle Jurassic has been confirmed by the discovery of isolated fossil teeth, though no dromaeosaurid body fossils have been found from this period.[5]
Contents[hide]- 1 Description
- 1.1 Foot
- 1.2 Tail
- 1.3 Size
- 1.4 Feathers
- 2 Paleobiology
- 2.1 Claw function
- 2.2 Group behavior
- 2.3 Flying and gliding
- 2.4 Senses
- 2.5 Paleopathology
- 3 Classification
- 3.1 Relationship with birds
- 3.2 Alternative theories and flightlessness
- 3.3 Taxonomy
- 3.4 Phylogeny
- 4 Technical diagnosis
- 5 In popular culture
- 6 References
- 7 External links
The distinctive dromaeosaurid body plan helped to rekindle theories that at least some dinosaurs may have been active, fast, and closely related to birds. Robert Bakker’s illustration for John Ostrom’s 1969 monograph,[6] showing the dromaeosaurid Deinonychus in a fast run, is among the most influential paleontological reconstructions in history.[7] The dromaeosaurid body plan includes a relatively large skull, serrated teeth, narrow snout, and forward-facing eyes which indicate some degree of binocular vision.[8] Dromaeosaurids, like most other theropods, had a moderately long S-curved neck, and their trunk was relatively short and deep. Like other maniraptorans, they had long arms that could be folded against the body in some species, and relatively large hands with three long fingers (the middle finger being the longest and the first finger being the shortest) ending in large claws.[9] The dromaeosaurid hip structure featured a characteristically large pubic boot projecting beneath the base of the tail. Dromaeosaurid feet bore a large, recurved claw on the second toe. Their tails were slender, with long, low, vertebrae lacking transverse process and neural spines after the 14th caudal vertebra.[9]
It is now known that at least some, and probably all, dromaeosaurids were covered in feathers, including large, vaned, wing and tail feathers. This development, first hypothesized in the mid-late 1980s and confirmed by fossil discoveries in 1999, represents a significant change in the way dromaeosaurids have historically been depicted in art and film (see “Feathers” class=MsoNormal style=\"MARGIN: 0in 0in 0pt\">
Dromeosaur Raptor Dinosaur Tooth, Vertebrae, Limb Bone Fossil LDB #1274 15o:
$99.99