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Allosaurus
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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 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:
- Allosaurus was a genus of dinosaur.
- "Allosaurus" means "different lizard" or "strange lizard". This name was chosen by Othniel C. Marsh in 1877.
- 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.
- 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).
- Allosaurus lived between about 154 million years ago and 135 million years ago, during the late Jurassic and early Cretaceous periods.
- Allosaurus lived in North America, Africa and Australia.
- Allosaurus was a carnivore (meat-eater).
- 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.
- Allosaurus was about 39 feet (11.9 meters) long.
- Allosaurus weighed about 1.7 tons.
- Allosaurus is the official state fossil of Utah.
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Allosaurus Books
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By Tim Bradley
Arbordale Publishing
Released: January 21st, 2020
Hardcover (32 pages)
 | List Price: $17.95*
Lowest New Price: $12.12*
In Stock.*
*(As of 01:16 Pacific 7 Apr 2020 More Info)
Click Here | Description:
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
Click here for more information |
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By Susan H Gray
Brand: Child's World
Released: August 1st, 2009
Library Binding (24 pages)
 | List Price: $27.07*
Lowest New Price: $24.87*
Usually ships within 2 to 3 days.*
*(As of 01:16 Pacific 7 Apr 2020 More Info)
Click Here | Description:
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
Click here for more information |
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By Marco Signore
Abbeville Kids
Released: October 6th, 2009
Hardcover (64 pages)
 | List Price: $15.95*
Lowest Used Price: $9.42*
In Stock.*
*(As of 01:16 Pacific 7 Apr 2020 More Info)
Click Here | Description:
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
Click here for more information |
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By Joanne Mattern
Brand: Weekly Reader Early Learning
Released: January 1st, 2009
Paperback (24 pages)
 | Lowest New Price: $8.15*
In Stock.*
*(As of 01:16 Pacific 7 Apr 2020 More Info)
Click Here | Description:
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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By Stephen Cole
Brand: Dutton Juvenile
Released: June 4th, 2001
Mass Market Paperback (48 pages)
 | List Price: $7.99*
Lowest Used Price: $6.03*
In Stock.*
*(As of 01:16 Pacific 7 Apr 2020 More Info)
Click Here | Description:
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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By Grace Hansen
Abdo Kids Jumbo
Released: September 1st, 2017
Library Binding (24 pages)
 | Lowest New Price: $28.50*
Temporarily out of stock. Order now and we'll deliver when available. We'll e-mail you with an estimated delivery date as soon as we have more information. Your account will only be charged when we ship the item.*
*(As of 01:16 Pacific 7 Apr 2020 More Info)
Click Here | 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
Click here for more information |
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,
entitled "The Ballad of Big Al".
