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Dinosaur Jungle   >   Dinosaur Names   >   Allosaurus
Dinosaur Jungle   >   Dinosaur Types   >   Allosaurus

Allosaurus



dinosaur picture allosaurus

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Scientific Classification
  Kingdom Animalia
  Phylum Chordata
  Class Sauropsida
  Superorder Dinosauria
  Order Saurischia
  Suborder Theropoda
  Infraorder Carnosauria
  Superfamily Allosauroidea
  Family Allosauridae
  Genus Allosaurus
Allosaurus was a common carnivorous (meat-eating) dinosaur in North America during the late Jurassic and early Cretaceous period, approximately 154 to 135 million years ago. Allosaurus fossils have also been found in Africa and Australia.

Allosaurus was up to 39 feet (11.9 meters) long, and weighed approximately 1.7 tons.

Some scientists believe Allosaurus was too heavy to chase down prey, and therefore was probably a scavenger. However, others believe that Allosaurus may have been quite agile, and could even have hunted in packs to bring down giant herbivores (plant-eaters) such as Apatosaurus or Diplodocus.

The first Allosaurus fossil was incorrectly described as a "petrified horse hoof". In fact, it was a caudal vertebra (tail bone) of this dinosaur, although it was not recognized as such at the time. Using much more material, including a partial skeleton, Othniel C. Marsh published the first description of Allosaurus in 1877.

One of the most important Allosaurus specimens found, was discovered in Wyoming, in 1991. This animal, which has been nicknamed "Big Al", was actually smaller than average for its particular species of Allosaurus (it was probably not fully grown), and even though many bones showed signs of infection (which may have contributed to the animal's death), was very important because the skeleton was 95% complete. Furthermore, the same team which discovered "Big Al", also subsequently discovered a second well-preserved specimen, which has been nicknamed "Big Al Two". The discovery, and possible life-story of "Big Al", served as inspiration for a special episode of the BBC/Discovery TV series, Walking With Dinosaurs, entitled "The Ballad of Big Al".

Allosaurus has been designated the official state fossil of Utah, since 1988.

Allosaurus Skull Fossil
Fossilized Allosaurus skull at Dinosaur National Monument.


Allosaurus Timeline:



Allosaurus was a carnivore (meat-eater) that lived from 154 to 135 million years ago

Allosaurus was a carnivore (meat-eater) that lived from 154 to 135 million years ago

Related Information & Resources


See Also

Allosaurus Facts

 
Here is a summary of some of the key facts about Allosaurus:
  1. Allosaurus was a genus of dinosaur.

  2. "Allosaurus" means "different lizard" or "strange lizard". This name was chosen by Othniel C. Marsh in 1877.

  3. Allosaurus was a member of the Saurischia ("lizard-hipped") order of dinosaurs. What this means, is that although Allosaurus was not closely related to lizards, it did have similarly shaped pelvic bones.

  4. Allosaurus was a Theropod - a member of a group of related bipedal dinosaurs that included the ancestors of birds (although Allosaurus was not itself an ancestor of birds).

  5. Allosaurus lived between about 154 million years ago and 135 million years ago, during the late Jurassic and early Cretaceous periods.

  6. Allosaurus lived in North America, Africa and Australia.

  7. Allosaurus was a carnivore (meat-eater).

  8. Some scientists think that Allosaurus was probably a scavenger, but others think it was an active predator. There is even possibility that Allosaurus may have been a pack hunting animal, with individuals working together to bring down prey.

  9. Allosaurus was about 39 feet (11.9 meters) long.

  10. Allosaurus weighed about 1.7 tons.

  11. Allosaurus is the official state fossil of Utah.




Allosaurus Books


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Allosaurus (Little Paleontologist)
By Sally Lee

Capstone Press
Kindle Edition (32 pages)

Allosaurus (Little Paleontologist)
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Allosaurus (Little Paleontologist)
  • Manufacturer: Capstone Press
Details:
  • Kindle Edition
  • Format: Kindle eBook
  • Number of Pages: 32
  • Author: Sally Lee
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Do You Really Want to Meet Allosaurus? (Do You Really Want to Meet a Dinosaur?)
By Annette Bay Pimentel

Amicus Ink
Released: August 20th, 2019
Paperback (24 pages)

Do You Really Want to Meet Allosaurus? (Do You Really Want to Meet a Dinosaur?)
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Description:
Do You Really Want to Meet Allosaurus? (Do You Really Want to Meet a Dinosaur?)
  • Manufacturer: Amicus Ink
  • ISBN: 1681524945
  • EAN: 9781681524948
  • PartNumber: Illustrations, unspecified
Details:
  • Paperback
  • Number of Pages: 24
  • Author: Annette Bay Pimentel
  • Publication Date: August 20th, 2019
  • Release Date: August 20th, 2019
Physical Description:
  • Size: 9.05 Inches by 8.2 Inches by 0.3 Inches
  • Weight: 0.2 Pounds
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I am Allosaurus (I Am Prehistoric)
By Tim Bradley

Arbordale Publishing
Released: January 21st, 2020
Hardcover (32 pages)

I am Allosaurus (I Am Prehistoric)
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I am Allosaurus (I Am Prehistoric)
  • Manufacturer: Arbordale Publishing
  • ISBN: 164351749X
  • EAN: 9781643517490
Details:
  • Hardcover
  • Number of Pages: 32
  • Author: Tim Bradley
  • Publication Date: January 21st, 2020
  • Release Date: January 21st, 2020
Physical Description:
  • Size: 10.1 Inches by 8.9 Inches by 0.5 Inches
  • Weight: 0.85 Pounds
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Allosaurus (Introducing Dinosaurs)
By Susan H Gray

Brand: Child's World
Released: August 1st, 2009
Library Binding (24 pages)

Allosaurus (Introducing Dinosaurs)
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Allosaurus (Introducing Dinosaurs)
  • Manufacturer: Childs World Inc
  • Brand: Brand: Child's World
  • ISBN: 1602532346
  • EAN: 9781602532342
Details:
  • Product Category: Library Binding
  • Number of Pages: 24
  • Author: Susan H Gray
  • Publication Date: August 1st, 2009
  • Release Date: August 1st, 2009
Physical Description:
  • Size: 8.75 Inches by 9.75 Inches by 0.5 Inches
Features:
  • Used Book in Good Condition
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Allosaurus and Its Relatives: The Need-to-Know Facts (Dinosaur Fact Dig)
By Megan Cooley Peterson

Capstone Press
Released: August 1st, 2016
Paperback (32 pages)

Allosaurus and Its Relatives: The Need-to-Know Facts (Dinosaur Fact Dig)
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Description:
Allosaurus and Its Relatives: The Need-to-Know Facts (Dinosaur Fact Dig)
  • Manufacturer: Capstone Press
  • ISBN: 1515727017
  • EAN: 9781515727019
Details:
  • Paperback
  • Number of Pages: 32
  • Author: Megan Cooley Peterson
  • Publication Date: August 1st, 2016
  • Release Date: August 1st, 2016
Physical Description:
  • Size: 10.0 Inches by 8.9 Inches by 0.1 Inches
  • Weight: 0.0 Grams
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Can You Tell a Tyrannosaurus from an Allosaurus? (Lightning Bolt Books ® ― Dinosaur Look-Alikes)
By Buffy Silverman

LernerClassroom
Released: August 1st, 2013
Paperback (32 pages)

Can You Tell a Tyrannosaurus from an Allosaurus? (Lightning Bolt Books ® ― Dinosaur Look-Alikes)
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Can You Tell a Tyrannosaurus from an Allosaurus? (Lightning Bolt Books ® ― Dinosaur Look-Alikes)
  • Manufacturer: LernerClassroom
  • ISBN: 1467715441
  • EAN: 9781467715447
  • PartNumber: Illustrated
Details:
  • Paperback
  • Number of Pages: 32
  • Author: Buffy Silverman
  • Publication Date: August 1st, 2013
  • Release Date: August 1st, 2013
Physical Description:
  • Size: 10.0 Inches by 7.3 Inches by 0.1 Inches
  • Weight: 0.26 Pounds
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The Hunting Pack: Allosaurus (Dinosaurs)
By Marco Signore

Abbeville Kids
Released: October 6th, 2009
Hardcover (64 pages)

The Hunting Pack: Allosaurus (Dinosaurs)
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The Hunting Pack: Allosaurus (Dinosaurs)
  • Manufacturer: Abbeville Kids
  • ISBN: 0789210118
  • EAN: 9780789210111
Details:
  • Hardcover
  • Number of Pages: 64
  • Author: Marco Signore
  • Publication Date: October 6th, 2009
  • Release Date: October 6th, 2009
Physical Description:
  • Size: 12.0 Inches by 8.0 Inches by 0.5 Inches
  • Weight: 1.05 Pounds
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Allosaurus (Let's Read About Dinosaurs)
By Joanne Mattern

Brand: Weekly Reader Early Learning
Released: January 1st, 2009
Paperback (24 pages)

Allosaurus (Let s Read About Dinosaurs)
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Allosaurus (Let's Read About Dinosaurs)
  • Manufacturer: Weekly Reader/Gareth Stevens Pub
  • Brand: Brand: Weekly Reader Early Learning
  • ISBN: 0836894189
  • EAN: 9780836894189
  • PartNumber: colour illustrations, maps, frontispiece
Details:
  • Paperback
  • Number of Pages: 24
  • Author: Joanne Mattern
  • Publication Date: January 1st, 2009
  • Release Date: January 1st, 2009
Physical Description:
  • Size: 7.0 Inches by 7.0 Inches by 0.25 Inches
  • Weight: 0.2 Pounds
Features:
  • Used Book in Good Condition
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Allosaurus: The Life and Death of Big Al (Discovery Kids)
By Stephen Cole

Brand: Dutton Juvenile
Released: June 4th, 2001
Mass Market Paperback (48 pages)

Allosaurus: The Life and Death of Big Al (Discovery Kids)
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Allosaurus: The Life and Death of Big Al (Discovery Kids)
  • Manufacturer: Dutton Juvenile
  • Brand: Brand: Dutton Juvenile
  • ISBN: 0525467734
  • EAN: 9780525467731
Details:
  • Product Category: Mass Market Paperback
  • Number of Pages: 48
  • Author: Stephen Cole
  • Publication Date: June 4th, 2001
  • Release Date: June 4th, 2001
Physical Description:
  • Size: 10.78 Inches by 8.5 Inches by 0.16 Inches
  • Weight: 0.53 Pounds
Features:
  • Used Book in Good Condition
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Allosaurus (Dinosaurs)
By Grace Hansen

Abdo Kids Jumbo
Released: September 1st, 2017
Library Binding (24 pages)

Allosaurus (Dinosaurs)
Lowest New Price: $28.50*
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Description:
Allosaurus (Dinosaurs)
  • Manufacturer: Abdo Kids Jumbo
  • ISBN: 1532100353
  • EAN: 9781532100352
  • PartNumber: K035-2
Details:
  • Product Category: Library Binding
  • Number of Pages: 24
  • Author: Grace Hansen
  • Publication Date: September 1st, 2017
  • Release Date: September 1st, 2017
Physical Description:
  • Size: 9.25 Inches by 11.0 Inches by 0.5 Inches
  • Weight: 0.8 Pounds
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