Pachycephalosaurus

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Pachycephalosaurus was a ornithopod dinosaur with a thick, armored skull frilled with spikes, probably used for head-butting during mating, similar to modern rams.

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cay thuoc

@caythuoc

Pachycephalosaurus was a ornithopod dinosaur with a thick, armored skull frilled with spikes, probably used for head-butting during mating, similar to modern rams.

Pachycephalosaurus - Wikipedia, the free encyclopedia

Pachycephalosaurus is a genus of pachycephalosaurid dinosaurs. The type species, P. wyomingensis, is the only known species.
https://en.wikipedia.org/wiki/Pachycephalosaurus
Pachycephalosauria - Wikipedia, the free encyclopedia

Pachycephalosauria is a clade of ornithischian dinosaurs. Genera include Pachycephalosaurus, Stegoceras, Stygimoloch, and Dracorex.
https://en.wikipedia.org/wiki/Pachycephalosauria
Study Confirms Head-Butting Behavior in Dome-Headed Dinosaurs - Sci-News

Dome-headed dinosaurs from the late Cretaceous period known as pachycephalosaurids used domes atop their heads to fight for territory and mates.
http://www.sci-news.com/paleontology/science-head-butting-dome-headed-dinosaurs-01247.html
Pachycephalosaurus - Prehistoric-Wildlife

Facts and information about the dinosaur Pachycephalosaurus and thousands of other prehistoric creatures.
http://www.prehistoric-wildlife.com/species/p/pachycephalosaurus.html
Pachycephalosaurus Wyomingensis - National Geographic

Pachycephalosaurus wyomingensis was the largest of the pachycephalosaurids-"thick-headed dinosaurs"-which featured extremely thick skullcaps.
http://animals.nationalgeographic.com/animals/prehistoric/pachycephalosaurus-wyomingensis
Pachycephalosaurus - ScienceViews

The Pachycephalosaurus had a huge skull plate, providing cushion for its small brain. The plate was surrounded by small blunt spikes. It had a small muzzle with a pointed beak and tiny teeth.
http://scienceviews.com/dinosaurs/pachycephalosaurus.html
10 Bone-Headed Facts About Pachycephalosaurus - Mental Floss

Pachycephalosaurus' domed, heavily-built head looks like it was capable inflicting some serious damage. Unfortunately, trying to decipher how this animal used that noggin has given many poor scientists headaches of their own.
http://mentalfloss.com/article/58415/10-bone-headed-facts-about-pachycephalosaurus
Fossil Testifies to Pachycephalosaurus Pain - Smithsonian

A damaged skull throws support to the idea that some dome-headed dinosaurs butted heads
http://www.smithsonianmag.com/science-nature/fossil-testifies-to-pachycephalosaur-pain-79971905
Pachycephalosaurus - DinosaurFacts

Information on the Pachycephalosaurus including pictures, facts, and a short biography.
http://www.dinosaurfacts.org/pachycephalosaurus
Pachycephalosaurus - About

The plant-eating dinosaur Pachycephalosaurus gave new meaning to the word "blockhead."
http://dinosaurs.about.com/od/herbivorousdinosaurs/p/pachycephalo.htm

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Pachycephalosaurus Temporal range: Late Cretaceous ( Maastrichtian), 70–66 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓

Cast of the "Sandy" specimen, Royal Ontario Museum
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Dinosauria
Clade:	†Ornithischia
Clade:	†Neornithischia
Clade:	†Pachycephalosauria
Family:	†Pachycephalosauridae
Tribe:	†Pachycephalosaurini
Genus:	†Pachycephalosaurus Brown & Schlaikjer, 1943
Type species
†Pachycephalosaurus grangeri Brown & Schlaikjer, 1943 (Junior synonym of P. wyomingensis)
Species
†P. wyomingensis (Gilmore, 1931) (conserved name) †P. spinifer? (Galton & Sues, 1983)
Synonyms
Synonyms of P. wyomingensis Tylosteus ornatus Leidy, 1872 (rejected name) Troodon wyomingensis Gilmore, 1931 Pachycephalosaurus grangeri Brown & Schlaikjer, 1943 Pachycephalosaurus reinheimeri Brown & Schlaikjer, 1943 Stenotholus kohleri Giffin, Gabriel & Johnson, 1988^[1] Stygimoloch spinifer? Galton & Sues, 1983 Dracorex hogwartsia? Bakker et al., 2006

Source : Wikipedia under CC-BY-SA license

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Pachycephalosaurus - Wikipedia, the free encyclopedia

Pachycephalosaurus is a genus of pachycephalosaurid dinosaurs. The type species, P. wyomingensis, is the only known species.
https://en.wikipedia.org/wiki/Pachycephalosaurus
Pachycephalosauria - Wikipedia, the free encyclopedia

Pachycephalosauria is a clade of ornithischian dinosaurs. Genera include Pachycephalosaurus, Stegoceras, Stygimoloch, and Dracorex.
https://en.wikipedia.org/wiki/Pachycephalosauria
Study Confirms Head-Butting Behavior in Dome-Headed Dinosaurs - Sci-News

Dome-headed dinosaurs from the late Cretaceous period known as pachycephalosaurids used domes atop their heads to fight for territory and mates.
http://www.sci-news.com/paleontology/science-head-butting-dome-headed-dinosaurs-01247.html
Pachycephalosaurus - Prehistoric-Wildlife

Facts and information about the dinosaur Pachycephalosaurus and thousands of other prehistoric creatures.
http://www.prehistoric-wildlife.com/species/p/pachycephalosaurus.html
Pachycephalosaurus Wyomingensis - National Geographic

Pachycephalosaurus wyomingensis was the largest of the pachycephalosaurids-"thick-headed dinosaurs"-which featured extremely thick skullcaps.
http://animals.nationalgeographic.com/animals/prehistoric/pachycephalosaurus-wyomingensis
Pachycephalosaurus - ScienceViews

The Pachycephalosaurus had a huge skull plate, providing cushion for its small brain. The plate was surrounded by small blunt spikes. It had a small muzzle with a pointed beak and tiny teeth.
http://scienceviews.com/dinosaurs/pachycephalosaurus.html
10 Bone-Headed Facts About Pachycephalosaurus - Mental Floss

Pachycephalosaurus' domed, heavily-built head looks like it was capable inflicting some serious damage. Unfortunately, trying to decipher how this animal used that noggin has given many poor scientists headaches of their own.
http://mentalfloss.com/article/58415/10-bone-headed-facts-about-pachycephalosaurus
Fossil Testifies to Pachycephalosaurus Pain - Smithsonian

A damaged skull throws support to the idea that some dome-headed dinosaurs butted heads
http://www.smithsonianmag.com/science-nature/fossil-testifies-to-pachycephalosaur-pain-79971905
Pachycephalosaurus - DinosaurFacts

Information on the Pachycephalosaurus including pictures, facts, and a short biography.
http://www.dinosaurfacts.org/pachycephalosaurus
Pachycephalosaurus - About

The plant-eating dinosaur Pachycephalosaurus gave new meaning to the word "blockhead."
http://dinosaurs.about.com/od/herbivorousdinosaurs/p/pachycephalo.htm

Pachycephalosaurus Temporal range: Late Cretaceous ( Maastrichtian), 70–66 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓

Cast of the "Sandy" specimen, Royal Ontario Museum
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Dinosauria
Clade:	†Ornithischia
Clade:	†Neornithischia
Clade:	†Pachycephalosauria
Family:	†Pachycephalosauridae
Tribe:	†Pachycephalosaurini
Genus:	†Pachycephalosaurus Brown & Schlaikjer, 1943
Type species
†Pachycephalosaurus grangeri Brown & Schlaikjer, 1943 (Junior synonym of P. wyomingensis)
Species
†P. wyomingensis (Gilmore, 1931) (conserved name) †P. spinifer? (Galton & Sues, 1983)
Synonyms
Synonyms of P. wyomingensis Tylosteus ornatus Leidy, 1872 (rejected name) Troodon wyomingensis Gilmore, 1931 Pachycephalosaurus grangeri Brown & Schlaikjer, 1943 Pachycephalosaurus reinheimeri Brown & Schlaikjer, 1943 Stenotholus kohleri Giffin, Gabriel & Johnson, 1988^[1] Stygimoloch spinifer? Galton & Sues, 1983 Dracorex hogwartsia? Bakker et al., 2006

Source : Wikipedia under CC-BY-SA license

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Pachycephalosaurus

Pachycephalosaurus was a ornithopod dinosaur with a thick, armored skull frilled with spikes, probably used for head-butting during mating, similar to modern rams.

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