Ankylosauria Dinosauria Early Cretaceous Eurypoda Genasauria Nodosauridae North America Ornithischia Thyreophora

Tatankacephalus cooneyorum

Dinosaur: Tatankacephalus cooneyorum

Cretaceous: 121.4–100.5 Ma

Type: Ankylosaur

*Length:**	3.9 m	12.8 ft
*Weight:**	450 kg	992 lb

ESR: 2 / 4 (estimated size reliability)
*The largest known specimen

Area: North America

Period

Epoch: Early Cretaceous
Stage: Late Aptian-Early Albian
Years: 121.4–100.5 Ma

Details

Status: valid
Author: Parsons & Parsons
Year: 2009

Distribution

Area: North America
Country: USA
Region: Montana
Formation: Cloverly

Classification

Dinosauria
Ornithischia
Genasauria
Thyreophora
Eurypoda
Ankylosauria
Nodosauridae

Sources

Material: Incomplete skull, rib fragments and 2 osteoderms.
References: Arbour, V. M., & Currie, P. J. (2015). Systematics, phylogeny and palaeobiogeography of the ankylosaurid dinosaurs.

Locations

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