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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
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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.
Papo
Toy
 | Lowest New Price: $5.90*
*(As of 17:46 Pacific 2 Sep 2010 More Info)
Click Here | - Papo Toys
- Model Size: 4.5" L x 3.3" H
- Item is sold as single piece
Product Description:
The Papo toy line features beatifully crafted figurines and animals. Papo toys come in a wide variety of colors, all hand painted and bursting with imagination. We carry a wide selection for hours of play. Scale 1:20 True to life modeling. Meticulously hand painted figurines. |
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Carnegie Collection
Toy
 | Lowest New Price: $16.99*
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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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American Science & Surplus
Misc.
 | Lowest New Price: $10.95*
*(As of 17:46 Pacific 2 Sep 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. |
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Fisher-Price
Toy
 | Lowest New Price: $8.99*
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Click Here | Product Description:
Fisher Price Go Diego Go Dinosaur figures |
|
Wild Republic
Toy
 | Lowest New Price: $9.99*
*(As of 17:46 Pacific 2 Sep 2010 More Info)
Click Here | - 3 Detailed Dinosaur Figures
- Size: From 3.75 to 4.75 inches long including tails
- Packaging: Retail Window Box
Product Description:
The fun will be endless with these highly detailed replicas of your favorite dinosaurs from the Dinosauria collection. You'll be back in the time when dinosaurs ruled the earth. Dinos are made from slightly flexible pvc plastic. Set includes: Triceratops, Stegosaurus, Pachycephalosaurus. Size ranges from about 3.75 up to 4.75 inches long including tails. |
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Holztiger
Toy
 | Lowest New Price: $10.19*
*(As of 17:46 Pacific 2 Sep 2010 More Info)
Click Here | - Age: 3+
- Measurements: length 6 x width 2 inches x depth 0.9 inches
- Made in Germany
Product Description:
Holztiger 7340 - Sturdy figure made from solid hardwood. All surfaces and edges are sanded to a very smooth finish, then hand-painted with nontoxic, waterbased paints and sealed with a nontoxic water lacquer making the figure resistant to perspiration and saliva. Measures 2.75" x 6" Recommended for three years and up. Handcrafted in Germany. |
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HASBRO
Toy
 | Lowest New Price: $38.00*
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Click Here | Product Description:
RELEASED BY HASBRO IN 1999 |
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Toy Rocket
Toy
 | |
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Papo
Toy
 | Lowest New Price: $34.50*
*(As of 17:46 Pacific 2 Sep 2010 More Info)
Click Here | - Quality-molded
- Papo dinosaurs are exquisite
Product Description:
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.
Quality-molded, hand-painted replica from Papo is a must-have for the avid dinosaur collector, or as fun add on to any Papo castle or adventure set.
This Set Includes
* Baby Pachycephalosaur
* Pachyrhinosaurus
* Oviraptor |
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Definitely Dinosaurs - The Biggest Kind of Fun
Toy
| Lowest New Price: $49.99*
*(As of 17:46 Pacific 2 Sep 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 Michael P. Goecke
Buddy Books
Library Binding (32 pages; 1)
 | List Price: $25.65*
Lowest New Price: $20.89*
Lowest Used Price: $6.95*
Usually ships in 24 hours*
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Click Here |
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By Fabio Marco
Blackbirch
Hardcover (32 pages; 1)
 | List Price: $25.65*
Lowest New Price: $11.99*
Lowest Used Price: $4.95*
Usually ships in 24 hours*
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Click Here |
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Books LLC
Paperback (68 pages)
 | List Price: $14.14*
Lowest New Price: $14.14*
Usually ships in 24 hours*
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Click Here | Product Description:
Kapitel: Stenopelix, Dracorex, Pachycephalosaurus, Stygimoloch, Goyocephale, Homalocephale, Stegoceras, Prenocephale, Gravitholus, Sphaerotholus, Tylocephale, Wannanosaurus, Micropachycephalosaurus, Colepiocephale, Ferganocephale, Ornatotholus, Yaverlandia, Hanssuesia, Alaskacephale. Aus Wikipedia. Nicht dargestellt. Auszug: Pachycephalosaurus (pronounced , meaning "thick headed lizard," from Greek pachys-/παχυς- "thick", kephale/κεφαλη "head" and sauros/σαυρος "lizard") is a genus of pachycephalosaurid dinosaur. It lived during the Late Cretaceous Period (Maastrichtian stage) of what is now North America. Remains have been excavated in Montana, South Dakota, and Wyoming. It was an herbivorous or omnivorous creature which is only known from a single skull and a few extremely thick skull roofs. This dinosaur is monotypic, meaning the type species, P. wyomingensis, is the only known species. Pachycephalosaurus was one of the last non-avian dinosaurs before the K-T extinction event. Another dinosaur, Tylosteus of western North America, has been synonymized with Pachycephalosaurus. Like other pachycephalosaurids, Pachycephalosaurus was a bipedal omnivore with an extremely thick skull roof. It possessed long hindlimbs and small forelimbs. Pachycephalosaurus is the largest known pachycephalosaur, measuring nearly 4.5 to 5 metres (15 to 16 ft) in length and up to 2,000 kilograms (4,400 lb) in weight. The thick skull domes of Pachycephalosaurus and related genera gave rise to the theory that pachycephalosaurs used their skulls in intraspecific combat. This theory has been discredited in recent years. Size comparison of Pachycephalosaurus wyomingensis and a human.The anatomy of Pachycephalosaurus is poorly known, as only skull remains have been described. Pachycephalosaurus is famous for having a large, bony dome atop its skull, up to 25 cm (10 in) thick, which safely cushioned its tiny brain. The dome's rear aspect was edged with bon...http://booksllc.net/?l=de |
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By Frances Freedman
Gareth Stevens Publishing
Library Binding (24 pages; 1)
| List Price: $19.93*
Lowest New Price: $11.94*
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Click Here |
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By Janet Riehecky
Childs World
Library Binding (32 pages; 1)
| List Price: $21.36*
Lowest New Price: $5.95*
Lowest Used Price: $0.01*
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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)
| List Price: $6.95*
Lowest New Price: $1.00*
Lowest Used Price: $6.75*
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 credit card will not be charged until we ship the item.*
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Click Here |
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By Janet Riehecky
Childs World
Library Binding (32 pages)
| List Price: $21.36*
Lowest New Price: $39.75*
Lowest Used Price: $11.52*
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By Virginia Schomp
Benchmark Books (NY)
Library Binding (32 pages; 1)
| List Price: $29.93*
Lowest New Price: $8.95*
Lowest Used Price: $0.89*
Usually ships in 24 hours*
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By Frances Swann
Rourke Pub Group
School & Library Binding
| List Price: $21.93*
Lowest Used Price: $1.39*
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By Richard Addison
Dorling Kindersley Publishers Ltd
Paperback (32 pages)
| Lowest Used Price: $29.30*
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Click Here |
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