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 Jurassic-Era Transformable Dino-Eggs 1993 Thinkway dinosaur T-RexTyrannosaurus Jurassic-Era Transformable Dino-Eggs 1993 Thinkway dinosaur T-Rex $39.99 Dinosaur T-Rex Baby Figurine 3.75"H Jurassic Era Predator Tyrannosaurus StatueDinosaur T-Rex Baby Figurine 3.75"H Jurassic Era Predator Tyrannosaurus Statue $16.99
Penn-Rrd3-Penn-Plax Tyrannosaurus Dinosaur Aquarium Resin Ornament, 6.25 by 2.2Penn-Rrd3-Penn-Plax Tyrannosaurus Dinosaur Aquarium Resin Ornament, 6.25 by 2.2 $20.24 Schleich Tyrannosaurus Rex Red Exclusive Dinosaur Toy Fig New w Tags Item 72068Schleich Tyrannosaurus Rex Red Exclusive Dinosaur Toy Fig New w Tags Item 72068 $23.79
B002G7Haai Attack of the Tyrannosaurus [Dinosaur Cove #01 Attack Of Th]B002G7Haai Attack of the Tyrannosaurus [Dinosaur Cove #01 Attack Of Th] $3.85 Bibitime 3D Running Tyrannosaurus rex Dinosaur Unique Removable Mural Wall StickBibitime 3D Running Tyrannosaurus rex Dinosaur Unique Removable Mural Wall Stick $14.68
1997 Jurassic Park The Lost World Jp29 Thrasher T Rex Tyrannosaurus Rex Dinosaur1997 Jurassic Park The Lost World Jp29 Thrasher T Rex Tyrannosaurus Rex Dinosaur $71.00 Tyrannosaurus Rex Pop! Vinyl Jurassic ParkTyrannosaurus Rex Pop! Vinyl Jurassic Park $13.83
Mcdonalds Jurassic World Tyrannosaurus Rex Train CarMcdonalds Jurassic World Tyrannosaurus Rex Train Car $4.49 Was:  Previous Price $4.99 Dinoriders Action Figure Vintage 1987 Tyco dinosaur T Rex Bitor tyrannosaurusDinoriders Action Figure Vintage 1987 Tyco dinosaur T Rex Bitor tyrannosaurus $19.95
Folkmanis Hand Puppet Tyrannosaurus Rex Stage PuppetFolkmanis Hand Puppet Tyrannosaurus Rex Stage Puppet $34.99 8 pcs dinosaur set, dinosaur toys velociraptor tyrannosaurus velociraptor/fast8 pcs dinosaur set, dinosaur toys velociraptor tyrannosaurus velociraptor/fast $20.02
Kids Educational Toys 3D Dinosaur Tyrannosaurus Puzzle Models Wooden Puzzle ToysKids Educational Toys 3D Dinosaur Tyrannosaurus Puzzle Models Wooden Puzzle Toys $2.94 Was:  Previous Price $3.09 B005Zo88O6 Its Tyrannosaurus Rex! - a Smithsonian Prehistoric Pals Book (withB005Zo88O6 Its Tyrannosaurus Rex! - a Smithsonian Prehistoric Pals Book (with $3.85
Novelty Travel Portable On-Ear Foldable Headphones I Love HeartNovelty Travel Portable On-Ear Foldable Headphones I Love Heart $8.99 1996 Tyrannosaurus Rex Figure Safari Realistic Toy Dinosaur Collection1996 Tyrannosaurus Rex Figure Safari Realistic Toy Dinosaur Collection $5.99
Tyrannosaurus Wooden Skeleton Kit For Ages 6 And UpTyrannosaurus Wooden Skeleton Kit For Ages 6 And Up $12.99 R & M Polyresin Coated Tyrannosaurus Cookie Cutter, 6-Inch, Mint GreenR & M Polyresin Coated Tyrannosaurus Cookie Cutter, 6-Inch, Mint Green $6.23
Punk Dinosaur Skeleton Skull Bone Tyrannosaurus T-Rex Necklace Chain AlloyPunk Dinosaur Skeleton Skull Bone Tyrannosaurus T-Rex Necklace Chain Alloy $1.22 to $1.34 Novelty Travel Portable On-Ear Foldable Headphones Funny NerdyNovelty Travel Portable On-Ear Foldable Headphones Funny Nerdy $8.99
Tyrannosaurus Rex ‎– My People Were Fair And Had Sky In Their Hair. Cd NewTyrannosaurus Rex ‎– My People Were Fair And Had Sky In Their Hair. Cd New $12.97 Schleich Tyrannosaurus Rex Dinosaur Collectible Toy Figure New w Tag Item 14525Schleich Tyrannosaurus Rex Dinosaur Collectible Toy Figure New w Tag Item 14525 $21.78
New Mini Figures Building Toys Gray Masrani Indominus Rex Tyrannosaurus Rex SetNew Mini Figures Building Toys Gray Masrani Indominus Rex Tyrannosaurus Rex Set $10.76 Lego Jurassic Park Replacement Pieces Dinosaurs T-Rex Tyrannosaurus Rex PartsLego Jurassic Park Replacement Pieces Dinosaurs T-Rex Tyrannosaurus Rex Parts $14.50
Set of 2 Dinosaur Triceratops Wooden Rubber Stamp Stampin Craft TyrannosaurusSet of 2 Dinosaur Triceratops Wooden Rubber Stamp Stampin Craft Tyrannosaurus $2.95 New Schleich Tyrannosaurus Rex T-Rex Dinosaur 14502 with original tag excellentNew Schleich Tyrannosaurus Rex T-Rex Dinosaur 14502 with original tag excellent $14.00
2017 Pnso Rare Kinder Dinosaurs Figure Kids Education Museum Set Model Toys Doll2017 Pnso Rare Kinder Dinosaurs Figure Kids Education Museum Set Model Toys Doll $9.28 to $98.88 Playmobil-Tyrannosaurus T-Rex Dinosaur Figure (Look)Playmobil-Tyrannosaurus T-Rex Dinosaur Figure (Look) $19.99
Jurassic World Stomp And Strike Tyrannosaurus Rex [In Hand]Jurassic World Stomp And Strike Tyrannosaurus Rex [In Hand] $50.00 Fazolis Kids Jurassic Bones Tyrannosaurus Rex Bone Set with EggFazolis Kids Jurassic Bones Tyrannosaurus Rex Bone Set with Egg $9.50
Collect-A-Card's 1994 Mighty Morphin Power Rangers Series 1 single cardsCollect-A-Card's 1994 Mighty Morphin Power Rangers Series 1 single cards $2.10 to $4.21 tyrannosaurus rex pillow sham by home trend standard sizetyrannosaurus rex pillow sham by home trend standard size $12.99
mini dinosaur track / theropod decal /T-rex /Tyrannosaurus footprint stickermini dinosaur track / theropod decal /T-rex /Tyrannosaurus footprint sticker $3.00 Tyrannosaurus Rex ‎– A Beard Of Stars Cd NewTyrannosaurus Rex ‎– A Beard Of Stars Cd New $9.95
Novelty Travel Portable On-Ear Foldable Headphones Tyrannosaurus T-Rex DinosaurNovelty Travel Portable On-Ear Foldable Headphones Tyrannosaurus T-Rex Dinosaur $8.99 Oa Montana Council Patch Jsp 2017 Jamboree Tyrannosaurus Fossil Delegate FlapOa Montana Council Patch Jsp 2017 Jamboree Tyrannosaurus Fossil Delegate Flap $18.99 Was:  Previous Price $37.98
Unstoppable Tyrannosaurus Rex Men's Premium T-Shirt by Spreadshirt™Unstoppable Tyrannosaurus Rex Men's Premium T-Shirt by Spreadshirt™ $22.52 List price:  Previous Price $26.49 Dinosaur Construction Kit - Tyrannosaurus - Brand NewDinosaur Construction Kit - Tyrannosaurus - Brand New $7.19
Vintage Old Avon Decanter Tyrannosaurus Rex Bubble Bath Bottle @ boxVintage Old Avon Decanter Tyrannosaurus Rex Bubble Bath Bottle @ box $15.00 00004000 Teenie Beanie Babies Dinosaur McDonald's Rex, The Tyrannosaurus RexTeenie Beanie Babies Dinosaur McDonald's Rex, The Tyrannosaurus Rex $0.99
Educational Insights Geosafari Dino Digs Tyrannosaurus Rex - Brand New!Educational Insights Geosafari Dino Digs Tyrannosaurus Rex - Brand New! $34.99 T-Rex / Tyrannosaurus Rex A Beard Of Stars Cd album (Cdlp) Uk 534800-1 A&MT-Rex / Tyrannosaurus Rex A Beard Of Stars Cd album (Cdlp) Uk 534800-1 A&M $17.52
Dinosaur Skeleton Tyrannosaurus - Chunky Wooden PuzzlesDinosaur Skeleton Tyrannosaurus - Chunky Wooden Puzzles $33.95 McDonald's Ty Teenie Beanie Baby Rex the TyrannosaurusMcDonald's Ty Teenie Beanie Baby Rex the Tyrannosaurus $3.60 Was:  Previous Price $4.00
Unknown Tyrannosaurus Rex T-Rex Dinosaur 1960-1990's?Unknown Tyrannosaurus Rex T-Rex Dinosaur 1960-1990's? $14.00 1988 Carnegie Tyrannosaurus Rex Figure Safari Realistic Toy Dinosaur Collection1988 Carnegie Tyrannosaurus Rex Figure Safari Realistic Toy Dinosaur Collection $5.99
"Tyrannosaurus Rex" Dinosaur Round 1 oz.999 Copper Round part of dinosaur series"Tyrannosaurus Rex" Dinosaur Round 1 oz.999 Copper Round part of dinosaur series $2.90 T-Rex Jurassic Park Iii Ultra Tyrannosaurus 8" Dinosaur Not WorkingT-Rex Jurassic Park Iii Ultra Tyrannosaurus 8" Dinosaur Not Working $8.10 Was:  Previous Price $9.00
Fine Print Lithograph Tyrannosaurus Rex Fossil Skeleton by Cinde L. Steese 1982Fine Print Lithograph Tyrannosaurus Rex Fossil Skeleton by Cinde L. Steese 1982 $95.00 Tyrannosaurus Rex - Unicorn Cd NewTyrannosaurus Rex - Unicorn Cd New $12.95
Click to see more Tyrannosaurus Rex items at www.ebay.com
Prices current as of last update, 03/20/18 5:00pm.

Home Contact Resources Exchange Links eBay