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Pachycephalosaurus
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Pachycephalosaurus was a herbivore (plant-eating) dinosaur that
lived during the late Cretaceous period,
about 76 to 65 million years ago,
in North America.
It was one of the dinosaurs that died out in the Cretaceous-Tertiary
extinction,
65 million years ago.
The name Pachycephalosaurus means "thick-headed lizard",
and describes the creature's most noteworthy feature:
the huge 10 inch (25 centimeter) thick
bone dome on its head. At the rear of the dome were a number of bony knobs,
and the animal's snout also possessed several short bony spikes.
This has led most scientists to conclude that the animal was probably
related to the
Ceratopsians
(which include
Protoceratops,
Psittacosaurus,
Styracosaurus
and
Triceratops),
although unlike most
Ceratopsians,
Pachycephalosaurus is believed to have been bipedal.
It was once thought that Pachycephalosaurus would have used the dome
on its head either to engage in butting contests for mates (similar to
modern big-horned sheep), or to defend against predators. However,
it is now believed that this could not have been the case:
the head bones do not appear to be strong enough for such impacts,
the skulls lack shock absorbing features, and there no evidence of
scars or other damage have been found on
fossilized
Pachycephalosaurus skulls.
Another somewhat unusual feature of Pachycephalosaurus is its teeth.
The animal had very small ridged teeth which would have been
far less capable of chewing tough, fibrous plant material than
other herbivorous dinosaurs of the late Cretaceous. It is therefore
thought that perhaps Pachycephalosaurus lived on a diet of
leaves, seeds, fruit and perhaps insects.
So far, only the skull of Pachycephalosaurus has been discovered.
Scientists estimate that the fully grown creature was 15 feet (4.6 meters) long,
and weighed about 950 pounds (430 kilograms).
They have come up with these figures by examining
the skull and extrapolating the likely size on the creature based on
the head-to-body ratios of its close relatives.
Pachycephalosaurus Timeline:
Pachycephalosaurus was a herbivore (plant-eater) that lived from 76 to 65 million years ago
Related Information & Resources
Related Web Sites
See Also
Pachycephalosaurus Facts
Here is a summary of some of the key facts about Pachycephalosaurus:
- Pachycephalosaurus was a genus of dinosaur.
- "Pachycephalosaurus" means "thick-headed lizard". This name was chosen by Barnum Brown and Erich Maren Schlaikjer in 1943.
- Pachycephalosaurus was a member of the Ornithischia ("bird-hipped") order of dinosaurs. What this means, is that although Pachycephalosaurus was not closely related to birds, it did have similarly shaped pelvic bones.
- Pachycephalosaurus was a Pachycephalosaur - a member of a group of related herbivorous (plant-eating) dinosaurs with bony domes on their heads.
- Pachycephalosaurus lived between about 76 million years ago and 65 million years ago, during the late Cretaceous period.
- Pachycephalosaurus was one of the dinosaurs which died out during the Cretaceous-Tertiary mass extinction at the end of the Mesozoic Era.
- Pachycephalosaurus lived in North America.
- Pachycephalosaurus was a herbivore (plant-eater).
- Pachycephalosaurus was about 15 feet (4.6 meters) long.
- Pachycephalosaurus weighed about 950 pounds (430 kilograms).
Pachycephalosaurus Toys
Here are some toys/games from Amazon.com:
Disclosure: Products details and descriptions provided by Amazon.com. Our company may receive a payment if you purchase products from them after following a link from this website.
Hotaling Imports
Toy
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*(As of 17:41 Pacific 13 Mar 2010 More Info)
Click Here | - Papo Toys
- Model Size: 4.5" L x 3.3" H
- Item is sold as single piece
Product Description:
Our Pachycephalosaurus is a high quality, hand painted figure that inspires creative and imaginative play. Age 2 and up. |
|
Bully Land
Toy
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*(As of 17:41 Pacific 13 Mar 2010 More Info)
Click Here | Product Description:
For over 30 years all of your favorite characters have come to life as lovely figurines! BULLY fans, from child to adult collector, in more than 40 countries, play and collect BULLY figurines. 8 1/2"Made in Germany |
|
Toysmith
Toy
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*(As of 17:41 Pacific 13 Mar 2010 More Info)
Click Here | - 12 Realistic Dinosaur Figures
- Size: Approximately 4 inches long
Product Description:
Mesozoic Dinosaur Set of 12 realistic toy figures. Dinos are made from slightly flexible plastic with painted details, are hollow inside, and have their names molded underneath. Set includes: Stegosaurus, Triceratops, Styracosaurus, Tyrannosaurus, Brachiosaurus, Velociraptor, Dimetrodon, Ankylosaurus, Scelidosaurus, Parasaurolophus, Apatosaurus, and Pachycephalosaurus. Nicely made with lots of detail. |
|
Carnegie Collection
Toy
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*(As of 17:41 Pacific 13 Mar 2010 More Info)
Click Here | - The world's premier line of collectible dinosaur replicas.
- The hand-painted Pachycephalosaurus is scaled at 1:40 and measures 7.5" L x 3.5" (19 x 9 cm).
Product Description:
This replica has been researched and authenticated by the Carnegie Museum of Natural History, Pittsburgh, Pennsylvania. |
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Toy Rocket
Toy
 | |
|
American Science & Surplus
Misc.
 | Lowest New Price: $10.95*
*(As of 17:41 Pacific 13 Mar 2010 More Info)
Click Here | - It's A Dino Skull, You Dig? Yes, you do dig. And when you're finished digging, chipping, and brushing away the 6" x 5" x 4" plaster/earthen block, you're rewarded with a miniature replica of a skull from a Triceratops, Stegosaurus, Pachycephalosaurus, or a Tyrannosaurus. (We'll pick.) When you're done, mount it on the included wooden stand with a plaque identifying it. Includes a little wood pick and brush.
Product Description:
It's A Dino Skull, You Dig? Yes, you do dig. And when you're finished digging, chipping, and brushing away the 6" x 5" x 4" plaster/earthen block, you're rewarded with a miniature replica of a skull from a Triceratops, Stegosaurus, Pachycephalosaurus, or a Tyrannosaurus. (We'll pick.) When you're done, mount it on the included wooden stand with a plaque identifying it. Includes a little wood pick and brush. |
|
Holztiger
Toy
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*(As of 17:41 Pacific 13 Mar 2010 More Info)
Click Here | - Age: 3+
- Measurements: length 6 x width 2 inches x depth 0.9 inches
- Made in Germany
Product Description:
With this beautifully crafted figure made of maple wood, children discover nature in a playful manner. The child develops a feeling for the aesthetics of form and color. The figures are hand painted using only non-toxic water based paints, whereby the resultant finish also resistant to perspiration and saliva. For extra safety, all sharp edges have been softened. With it's durable and classic wooden figures, Holztiger offer children the basis for long years of creative play, either alone or in a group. |
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Jurassic Park
Toy
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Click Here | |
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Definitely Dinosaurs - The Biggest Kind of Fun
Toy
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*(As of 17:41 Pacific 13 Mar 2010 More Info)
Click Here | - Poseable legs
- Dinosaur and Cavester figures
Product Description:
A caveman and dinosaur set in a window box from Playskool, one of a series. This has a 10 inch long Pachycephalosaurus and "Reeve" the caveman(3.5 in tall). Box is 10 x 7 x 3 in and contains a storybook. |
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Pachycephalosaurus Books
Here are some books from Amazon.com:
Disclosure: Products details and descriptions provided by Amazon.com. Our company may receive a payment if you purchase products from them after following a link from this website.
By Graham Coleman
Weekly Reader Books
Hardcover
 | Lowest Used Price: $25.00*
*(As of 17:41 Pacific 13 Mar 2010 More Info)
Click Here | Product Description:
Crestaceous Period: Baryonyx, Chasmosaurus, Gallimimus, Maiasaura, Triceratops, Pachycephalosaurus, Psittacosaurusm - Jurassic: Brachiosaurus, Diplodocus, Megalosaurus, Pterodactylus, Steogosaurus, Vulcanodon - Triassic: Coelophysis |
|
By Michael P. Goecke
Buddy Books
Library Binding (32 pages; 1)
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Lowest New Price: $9.99*
Lowest Used Price: $7.00*
Usually ships in 24 hours*
*(As of 17:41 Pacific 13 Mar 2010 More Info)
Click Here |
|
By Fabio Marco Dalla Vecchia
Blackbirch Press
Library Binding (32 pages; 1)
 | List Price: $24.90*
Lowest New Price: $11.99*
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Usually ships in 24 hours*
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By Janet Riehecky
Childs World
Library Binding (32 pages)
| List Price: $21.36*
Lowest New Price: $23.94*
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By Frances Freedman
Gareth Stevens Publishing
Library Binding (24 pages; 1)
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Lowest New Price: $11.94*
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By Frances Swann
Rourke Pub Group
Library Binding
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By Janet Riehecky
Childs World
Library Binding (32 pages; 1)
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Lowest New Price: $7.08*
Lowest Used Price: $0.01*
*(As of 17:41 Pacific 13 Mar 2010 More Info)
Click Here | Product Description:
Presents known and hypothesized information about the dinosaur Pachydephalosaurus, including its discovery, physical appearance, and lifestyle. |
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By Daniel Cohen
Capstone Press
Paperback (24 pages; 1)
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Lowest New Price: $0.87*
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By Virginia Schomp
Benchmark Books (NY)
Library Binding (32 pages; 1)
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Lowest New Price: $8.95*
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Usually ships in 24 hours*
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Click Here |
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By Richard Addison
Dorling Kindersley Publishers Ltd
Paperback (32 pages)
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