Closeup of jawsCloseup of arm
Discover great deals on the many hard to find and one of a kind items available only on ebay!

Tyrannosaurus Rex

Tyrannosaurus rex (translates as "King of Tyrannous Reptiles" or literally "tyrant lizard king"), also known colloquially as T-Rex and The King of the Dinosaurs, was a giant carnivorous theropod dinosaur from the Upper Maastrichtian, the last stage of the Cretaceous period, 65–66 million years ago. more...

HomeHome
AmphibianAmphibian
ArthropodArthropod
BirdBird
CatCat
DinosaurDinosaur
AllosaurusAllosaurus
ApatosaurusApatosaurus
ArchaeopteryxArchaeopteryx
BrachiosaurusBrachiosaurus
BrontosaurusBrontosaurus
DiplodocusDiplodocus
GigantosaurusGigantosaurus
HadrosaurusHadrosaurus
PterodactylPterodactyl
StegosaurusStegosaurus
TriceratopsTriceratops
Tyrannosaurus Rex  Tyrannosaurus Rex
VelociraptorVelociraptor
DogDog
FishFish
MammalMammal
MythologicalMythological
ReptileReptile


Its fossil remains are relatively rare; as of 2005 only 30 specimens had been found, including three complete skulls. The first specimens found played an important role in the Bone Wars. T. rex is the best known carnivorous dinosaur, particularly because it was regarded as the largest to have ever existed for a long time. While evidence indicates that Giganotosaurus was probably larger, T. rex will very likely remain a subject of ongoing scientific research and popular culture.

Discovery and Classification

The locations of all of the discoveries are restricted to North America. The first specimen (a partial vertebra) was found by Edward Cope in 1892 and was described as Manospondylus gigas. It was assigned to Tyrannosaurus rex in 1912 by Henry Osborn. Barnum Brown, assistant curator of the American Museum of Natural History, found the second T. rex skeleton in Wyoming in 1900. This specimen was originally named Dynamosaurus imperiosus in the same paper in which Tyrannosaurus rex was described. Were it not for page order, Dynamosaurus would have become the official name. The original "Dynamosaurus" material resides in the collections of the Natural History Museum, London.

In 2000, there was a controversy regarding its name because the dinosaur bones unearthed in South Dakota in June that year may have been part of a fossil known as Manospondylus gigas. According to the rules of International Commission on Zoological Nomenclature, the system that gives animals their Latin designation, Cope's 1892 name—Manospondylus gigas—should have priority because his discovery came first. However, in the ICZN 4th edition, which took effect on 1 January 2000, Chapter 8, Article 35.5 stated that any such discovery made after 1999 does not cause the older name to replace the newer, prevailing name. Therefore, regardless of the result of the discovery, the "Tyrannosaurus rex" name is still used by biologists today.

Characteristics

Up to 50.4 feet and 20.4 feet in length and 4 tons in weight, T. rex was one of the largest carnivores of all time. Compared to other carnivorous dinosaurs, the skull of Tyrannosaurus is heavily modified. Many of the bones are fused together, preventing movement between them. The bones themselves are much more massive than is typical of a theropod, and the serrated teeth, far from being bladelike, are massive and oval in cross-section. Heavy wear and the bite marks found on bones of other dinosaurs indicate that these teeth could bite into solid bone. The teeth are often worn or broken at the tips from heavy use but, unlike mammals, were continually grown and shed throughout the life of the animal. Compared to other giant carnivorous dinosaurs such as Allosaurus, Tyrannosaurus appears to have had a sizeable brain, but was probably not particularly intelligent by mammalian standards.

The neck was short and musclular, to support the head. The arms of T. rex were very small, perhaps to make up for the weight of its enormous head, but were very sturdy. They may have been used for grasping during sex or as aids in standing. The legs were relatively long and slender for an animal of its size. To compensate for its immense bulk, the interior of many bones were hollow. This considerably reduced the weight of the skeleton while maintaining much of the strength of the bones.

Biology

As with all dinosaurs, much of Tyrannosaurus' biology—its lifespan, breeding strategy, coloration, ecology and physiology—remains unknown. A site in Alberta has at least nine Albertosaurus sarcophagus (a closely related animal) individuals of different ages preserved together, but whether these animals lived together or simply died together is unclear.

Feathers

It has been proposed that T. rex and other theropod dinosaurs may have had feathers. Small coelurosaurs (a closely related dinosaur group) from the Yixian Formation in Liaoning, China, have been discovered with either pennaceous feathers or fur-like "protofeathers", which suggest the possibility that tyrannosaurids may also have borne feathers as well. In 2004, the primitive tyrannosaurid Dilong paradoxus was discovered from the same formation with preserved long tail plumes. However, skin impressions from adult tyrannosaurs in Alberta and Mongolia appear to show the pebbly scales typical of other dinosaurs.

Evidence for Scavenging

Most debate about T. rex centers on its feeding patterns and locomotion. One scientist, noted hadrosaur expert Jack Horner, claims that T. rex was exclusively a scavenger, and did not engage in active hunting at all. Horner has only presented this in an official scientific context once, mainly discussing it in his books and in the media. His hypothesis is based on the following: T. rex have large (relative to their brain size) olfactory bulbs and olfactory nerves. These suggest a highly developed sense of smell, allegedly used to sniff out carcasses over great distances, like modern vultures. Their teeth could crack bone; a skill perhaps needed most when last to a kill and in need of extracting as much food (marrow) as possible from a carcass's least nutritious parts. Since at least some T. rex prey animals could move quickly, evidence that T. rex walked instead of ran could indicate that it was a scavenger (see more on this below). All scientists who have published on the subject since insist that T. rex was both a predator and a scavenger, taking whatever meat it could get depending on the opportunity it was presented with.

Read more at Wikipedia.org


[List your site here Free!]

Tyrannosaurus Rex Prophets, Seers & Sages, The Angel Japan Cd Uicy-9494 2004 NewTyrannosaurus Rex Prophets, Seers & Sages, The Angel Japan Cd Uicy-9494 2004 New $95.51 Jurassic Park Iii - Re-Ak A-Tsk - CamoXtreme - Canyon Tyrannosaurus RexJurassic Park Iii - Re-Ak A-Tsk - CamoXtreme - Canyon Tyrannosaurus Rex $224.16
Floor Puzzle Tyrannosaurus Rex Shaped 2" x 3" 50 large pieces Frank SchafferFloor Puzzle Tyrannosaurus Rex Shaped 2" x 3" 50 large pieces Frank Schaffer $9.88 Pillow Pets Rexy T-Rex Pee Wee 11" dinosaur tyrannosaurusPillow Pets Rexy T-Rex Pee Wee 11" dinosaur tyrannosaurus $9.39 Was:  Previous Price $9.99
Dig It Up -Excavation Kit- Tyrannosaurus RexDig It Up -Excavation Kit- Tyrannosaurus Rex $54.95 "Lot Of 5 Resin Dinosaur Miniature Figurines" Triceratops/Tyrannosaurus Rex/+"Lot Of 5 Resin Dinosaur Miniature Figurines" Triceratops/Tyrannosaurus Rex/+ $8.99
8 pcs Dinosaur Set, Omgod Dinosaur Toys Tyrannosaurus, Triceratops, Plesiosaur,8 pcs Dinosaur Set, Omgod Dinosaur Toys Tyrannosaurus, Triceratops, Plesiosaur, $16.24 Monster in My Pocket Series I Matchbox Figure 25 Point Tyrannosaurus RexMonster in My Pocket Series I Matchbox Figure 25 Point Tyrannosaurus Rex $16.99
Funrarity Dinosaur Tyrannosaurus Rex Hand Toy Collectible FigureFunrarity Dinosaur Tyrannosaurus Rex Hand Toy Collectible Figure $17.47 Visit Isla Muerta Men Tank Top Jurassic Fun Dinosaur T Rex Park TyrannosaurusVisit Isla Muerta Men Tank Top Jurassic Fun Dinosaur T Rex Park Tyrannosaurus $24.95 to $28.95
Dinosaur T-Tex Tyrannosaurus Rex Head Action Figure Carrying Case With 24 DinosDinosaur T-Tex Tyrannosaurus Rex Head Action Figure Carrying Case With 24 Dinos $26.05 Jurassic Park Replica Logo Embroidered Patch Suit Tyrannosaurus Rex 2 3 4 JeepJurassic Park Replica Logo Embroidered Patch Suit Tyrannosaurus Rex 2 3 4 Jeep $11.99
Personalized Jurassic Party Dinosaur Park Birthday Party Tyrannosaurus Rex ParkPersonalized Jurassic Party Dinosaur Park Birthday Party Tyrannosaurus Rex Park $13.95 4D Vision Tyrannosaurus Rex T-Rex Dinosaur Anatomy Model with Bones and Organs4D Vision Tyrannosaurus Rex T-Rex Dinosaur Anatomy Model with Bones and Organs $25.86 Was:  Previous Price $43.11
Colorata bow tie for children Tyrannosaurus skull stripe navy / engineColorata bow tie for children Tyrannosaurus skull stripe navy / engine $53.80 Vintage 1990s Imperial Tyrannosaurus T Rex Dinosaur Toy Battery Operated FiguresVintage 1990s Imperial Tyrannosaurus T Rex Dinosaur Toy Battery Operated Figures $49.99
Visit Isla Sorna Women Tank Top Jurassic Fun Dinosaur T Rex Park TyrannosaurusVisit Isla Sorna Women Tank Top Jurassic Fun Dinosaur T Rex Park Tyrannosaurus $24.95 Sale! Isle Of Wight Festival 1968 Ticket (Jefferson Airplane/Tyrannosaurus Rex)Sale! Isle Of Wight Festival 1968 Ticket (Jefferson Airplane/Tyrannosaurus Rex) $104.84
New Photograph Toy Tyrannosaurus Rex Road Blank Greetings Birthday Card Cp332New Photograph Toy Tyrannosaurus Rex Road Blank Greetings Birthday Card Cp332 $3.99 Tyrannosaurus Rex 9" Tall Plush T-Rex Dinosaur Stuffed AnimalTyrannosaurus Rex 9" Tall Plush T-Rex Dinosaur Stuffed Animal $38.19
Zooawa Tyrannosaurus Rex Dinosaur Figure Toy - CeladonZooawa Tyrannosaurus Rex Dinosaur Figure Toy - Celadon $19.43 T-Rex Tyrannosaurus Sling Bag Crossbody Women Shoulder Casual Bags LeatherT-Rex Tyrannosaurus Sling Bag Crossbody Women Shoulder Casual Bags Leather $13.90
Jurassic World Bashers & Biters Tyrannosaurus Rex FigureJurassic World Bashers & Biters Tyrannosaurus Rex Figure $23.55 The Hives - Tyrannosaurus Hives (Cd)The Hives - Tyrannosaurus Hives (Cd) $19.56
Dig a Dinosaur Skeleton Tyrannosaurus Rex kit by Kidz Lab 4MDig a Dinosaur Skeleton Tyrannosaurus Rex kit by Kidz Lab 4M $19.75 Safari Ltd Wild Safari Tyrannosaurus RexSafari Ltd Wild Safari Tyrannosaurus Rex $14.65
T-Rex Tyrannosaurus Dino Dinosaur Skeleton Display Figure 4D 3D Puzzle Model KitT-Rex Tyrannosaurus Dino Dinosaur Skeleton Display Figure 4D 3D Puzzle Model Kit $6.99 SuperfunTech Dinosaur Toy Figure Baby Tyrannosaurus RexSuperfunTech Dinosaur Toy Figure Baby Tyrannosaurus Rex $50.56
Color Photo 3D Lenticular Dinosaur Postcard Sacry Tyrannosaurus Rex AttackingColor Photo 3D Lenticular Dinosaur Postcard Sacry Tyrannosaurus Rex Attacking $6.99 Jurassic World Chomping Tyrannosaurus Rex FigureJurassic World Chomping Tyrannosaurus Rex Figure $26.99
Tyrannosaurus GameTyrannosaurus Game $3.99 2016 Silver $20 Tyrannosaurus Rex Coin.2016 Silver $20 Tyrannosaurus Rex Coin. $25.27
Colorata tie Tyrannosaurus skull stripe navy / engineColorata tie Tyrannosaurus skull stripe navy / engine $64.11 Punk Dinosaur Skeleton Skull Bone Tyrannosaurus T-Rex Necklace Chain AlloyPunk Dinosaur Skeleton Skull Bone Tyrannosaurus T-Rex Necklace Chain Alloy $6.75
Tyrannosaurus T. Rex WallJammer Wall Decal Kids Bedroom Sticker DinosaurTyrannosaurus T. Rex WallJammer Wall Decal Kids Bedroom Sticker Dinosaur $64.99 Colorata tie Tyrannosaurus skull komon NavyColorata tie Tyrannosaurus skull komon Navy $64.11
8 pcs Dinosaur Set, Omgod Dinosaur Toys Tyrannosaurus, Velociraptor, Lambe, Kids8 pcs Dinosaur Set, Omgod Dinosaur Toys Tyrannosaurus, Velociraptor, Lambe, Kids $15.29 Recur Tyrannosaurus Rex Large Realistic Dinosaur Toy FigureRecur Tyrannosaurus Rex Large Realistic Dinosaur Toy Figure $24.77
Tyrannosaurus Rex Dinosaur Toy Action Figure – Large And Realistic Design ForTyrannosaurus Rex Dinosaur Toy Action Figure – Large And Realistic Design For $11.34 Tyrannosaurus T. Rex Layout WallJammer Wall Kids Bedroom Sticker DinosaurTyrannosaurus T. Rex Layout WallJammer Wall Kids Bedroom Sticker Dinosaur $39.99
Tyrannosaurus Rex - Prophets Seers and Sages Angels Of The Ages [Cd]Tyrannosaurus Rex - Prophets Seers and Sages Angels Of The Ages [Cd] $8.67 Jurassic Tyrannosaurus Rex Action Dinosaur Models by GeoworldJurassic Tyrannosaurus Rex Action Dinosaur Models by Geoworld $106.39
ExtinctWorld Tyrannosaurus Rex T Rex Dinosaur Action Figure Toys Moveable ArmsExtinctWorld Tyrannosaurus Rex T Rex Dinosaur Action Figure Toys Moveable Arms $16.68 Steampunk Dead Tyrannosaurus T-Rex Dinosaur Skeleton Necklace Pendant ChainSteampunk Dead Tyrannosaurus T-Rex Dinosaur Skeleton Necklace Pendant Chain $1.29
4D Vision Large Tyrannosaurus Rex T-Rex Dinosaur Anatomy Model with Organs4D Vision Large Tyrannosaurus Rex T-Rex Dinosaur Anatomy Model with Organs $65.87 Was:  Previous Price $109.78 Schleich Tyrannosaurus RexSchleich Tyrannosaurus Rex $27.93
Click to see more Tyrannosaurus Rex items at www.ebay.com
Prices current as of last update, 02/22/18 2:40am.

Home Contact Resources Exchange Links eBay