AnkylosauriaDinosauriaEarly CretaceousEuropeEurypodaGenasauriaNodosauridaeOrnithischiaThyreophora

Hylaeosaurus armatus

Every month, 100,000 readers use the Dinosaur Database, but we receive no support from you. Developing and updating the database requires a lot of work. Therefore, as of September 1, 2025, the database will be closed. If you want it to remain open and be updated, please support us via the "Buy us a coffee" button available on every page or via the Support page.


Dinosaur: Hylaeosaurus armatus

Cretaceous: 139.8–132.6 Ma
Type: Ankylosaur

Length*:4 m13.1 ft
Weight*:700 kg1,543 lb
ESR: 1.5 / 4 (estimated size reliability)
*The largest known specimen

Europe

Area: Europe


Period

Epoch: Early Cretaceous
Stage: Late Valanginian
Years: 139.8–132.6 Ma

Details

Status: valid
Author: Mantell
Year: 1833

Distribution

Area: Europe
Country: United Kingdom
Region: England
Formation: Grinstead Clay


Locations


Sources

Material: Partial skeleton (seven cervical and four dorsal vertebrae, cervical and dorsal ribs, both scapulae and coracoids and numerous osteoderms) with skull fragments.
References: Raven et al. (2020). Osteology and Taxonomy of British Wealden Supergroup (Berriasian–Aptian) Ankylosaurs (Ornithischia, Ankylosauria).

________________________

If you are interested in Excel Professional version of Dinosaur or Pterosaur Database, write to us


Pterosaur Database