Ankylopollexia Cerapoda Dinosauria Genasauria Hadrosauridae Hadrosauriformes Hadrosauroidea Hadrosauromorpha Iguanodontia Late Cretaceous Neornithischia North America Ornithischia Ornithopoda Saurolophinae Saurolophini Styracosterna

Saurolophus osborni

Dinosaur: Saurolophus osborni

Cretaceous: 72.1–66 Ma

TRIASSIC

JURASSIC

CRETACEOUS

252

201

145

Type: Ornithopod

*Length:**	10.2 m	33.5 ft
*Weight:**	4.5 tons	9,921 lb

ESR: 4 / 4 (estimated size reliability)
*The largest known specimen

Area: North America

Period

Epoch: Late Cretaceous
Stage: Early Maastrichtian
Years: 72.1–66 Ma

Details

Status: valid
Author: Brown
Year: 1912

Distribution

Area: North America
Country: Canada
Region: Alberta
Formation: Horseshoe Canyon

Classification

Dinosauria
Ornithischia
Genasauria
Neornithischia
Cerapoda
Ornithopoda
Iguanodontia
Ankylopollexia
Styracosterna
Hadrosauriformes
Hadrosauroidea
Hadrosauromorpha
Hadrosauridae
Saurolophinae
Saurolophini

Sources

Material: At least 3 individuals (include almost complete skeleton with skull).
References: Bell (2011). Cranial osteology and ontogeny of Saurolophus angustirostris from the Late Cretaceous of Mongolia with comments on Saurolophus osborni from Canada.