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.
Dinosaur: Mantellisaurus atherfieldensis

Length*: | 7.2 m | 23.6 ft |
Weight*: | 1.5 t | 3,307 lb |
*The largest known specimen
Period
Epoch: Early Cretaceous
Stage: Barremian-Aptian
Years: 125.8–113 Ma
Details
Status: valid
Author: Paul
Year: 2006
Distribution
Area: Europe
Country: United Kingdom, Belgium, Germany, Spain
Region: England, Hainaut, North Rhine-Westphalia, Castilla-La Mancha, Valencian
Community
Formation: Wessex, Atherfield, Hythe, Weald Clay Group, Sainte-Barbe Clays, La Huérguina, Arcillas de Morella
Locations
Sources
Material: At least several individuals (or more, problematic)- include almost complete skeleton.
References: Norman, D.B. (2013) On the taxonomy and diversity of Wealden iguanodontian dinosaurs (Ornithischia: Ornithopoda).
Paul, G.S. (2008) "A revised taxonomy of the iguanodont dinosaur genera and species".
Eberth & Evans (2014) Hadrosaurs.