Genus

Valid Extinct

Pachyrhinosaurus

Sternberg 1950

Etymology Reptile au nez épais

Pachyrhinosaurus is a genus of centrosaurine ceratopsid dinosaur from the Late Cretaceous period of North America. The first examples were discovered by Charles M. Sternberg in Alberta, Canada, in 1946, and named in 1950. Over a dozen partial skulls and a large assortment of other fossils from various species have been found in Alberta and Alaska. A great number were not available for study until the 1980s, resulting in a relatively recent increase of interest in Pachyrhinosaurus.

Temporal range

Triassic

Jurassic

Cretaceous

Paleogene

Neogene

252 201 145 66 0 Ma

PBDB occurrences

Group

Dinosaures

Herbivore Ground dwelling Terrestrial

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Wikimedia

PBDB ↗ Wikipedia ↗

Classification

Dinosauria Unranked clade

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Ornithischia Unranked clade

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Neornithischia Unranked clade

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Pyrodontia Unranked clade

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Cerapoda Unranked clade

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Marginocephalia Unranked clade

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Ceratopsia Suborder

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Ceratopsidae Family

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Centrosaurinae Subfamily

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Pachyrhinosaurini Unranked clade

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Pachyrhinosaurus Genus

Measurements

Length

5,2 m ⓘ

Pachyrhinosaurus perotorum — min connu

6,9 m ⓘ

Pachyrhinosaurus canadensis — max connu

8 m ⓘ

Mass

2 000 kg ⓘ

Pachyrhinosaurus perotorum — min connu

3 900 kg ⓘ

Pachyrhinosaurus canadensis — max connu

4 000 kg ⓘ

Fossil sites 16 geolocated sites

Distribution

Top countries

🇨🇦 Canada

🇺🇸 United States

Geological formations

Horseshoe Canyon

St. Mary River

Wapiti

Prince Creek

Summit Creek

Temporal distribution

Maastrichtian (72.2–66 Ma)

Campanian (83.6–72.2 Ma)

Species (3)

Pachyrhinosaurus canadensis 84 Ma

Pachyrhinosaurus lakustai 84 Ma

Pachyrhinosaurus perotorum 72 Ma

News 1

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scale toy Dinosauria Pachyrhinosaurus

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Images 1

Bibliography

Original description

C. M. Sternberg. 1950. Pachyrhinosaurus canadensis, representing a new family of the Ceratopsia, from southern Alberta. National Museum of Canada Bulletin 118:109-120 DOI ↗

Bibliography (10)

D. C. Evans, D. A. Eberth, and M. J. Ryan. 2015. Hadrosaurid (Edmontosaurus) bonebeds from the Horseshoe Canyon Formation (Horsethief Member) at Drumheller, Alberta, Canada: geology, preliminary taphonomy, and significance. Canadian Journal of Earth Sciences 52:642-654 DOI ↗

A. R. Fiorillo and R. S. Tykoski. 2012. A new Maastrichtian species of the centrosaurine ceratopsid Pachyrhinosaurus from the North Slope of Alaska. Acta Palaeontologica Polonica 57(3):561-573 DOI ↗

P. J. Currie, W. Langston, and D. H. Tanke. 2008. A new species of Pachyrhinosaurus (Dinosauria, Ceratopsidae) from the Upper Cretaceous of Alberta, Canada. in A New Horned Dinosaur from an Upper Cretaceous Bone Bed in Alberta

E. B. Koppelhus. 2008. Palynology of the Wapiti Formation in the northwestern part of Alberta with special emphasis on a new Pachyrhinosaur bonebed. International Dinosaur Symposium in Fukui 2008: Recent Progress of the Study on Asian Dinosaurs and Paleoenvironments. Fukui Prefectural Dinosaur Museum, Fukui

F. Fanti, P. J. Currie, and S. Graber, K. Ormay, B. Hunt,. 2007. Exploration and discovery in northwest Alberta’s Peace Country. Alberta Palaeontological Society Bulletin 22(3):15-18

D. H. Tanke. 2004. Mosquitoes and mud: the 2003 Royal Tyrrell Museum of Palaeontology expedition to the Grande Prairie region (northwestern Alberta, Canada). Alberta Palaeontological Society Bulletin 19(2):3-31

W. A. Clemens. 1991. A latest Cretaceous, high paleolatitude mammalian fauna from the North Slope of Alaska. In Z. Kielan-Jaworowska, N. Heintz, & H. A. Nakrem (eds.), Fifth Symposium on Mesozoic Terrestrial Ecosystems and Biota, Extended Abstracts. Contributions from the Paleontological Museum, Unviersity of Oslo 364:15-16

W. Langston. 1975. The ceratopsian dinosaurs and associated lower vertebrates from the St. Mary River Formation (Maestrichtian) at Scabby Butte, southern Alberta. Canadian Journal of Earth Sciences 12:1576-1608 DOI ↗

W. Langston. 1968. A further note on Pachyrinosaurus (Reptilia: Ceratopsia). Journal of Paleontology 42(5):1303-1304

C. M. Sternberg. 1950. Pachyrhinosaurus canadensis, representing a new family of the Ceratopsia, from southern Alberta. National Museum of Canada Bulletin 118:109-120 DOI ↗

Pachyrhinosaurus

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