Genus
Valid Extinct

Hylaeosaurus

Mantell 1833
Etymology Reptile des bois

Hylaeosaurus is a herbivorous ankylosaurian dinosaur that lived about 136 million years ago, in the late Valanginian stage of the early Cretaceous period of England. It was found in the Grinstead Clay.

Temporal range
Triassic
Jurassic
Cretaceous
Paleogene
Neogene
252 201 145 66 0 Ma
PBDB occurrences
10
Group
Dinosaures
Herbivore Ground dwelling, gregarious Terrestrial
Hylaeosaurus
click to enlarge
Holotype specimen of Hylaeosaurus armatus Mantell, 1833 (NMH R3775) from the Grinstead Clay Formation (late Valanginian) of Tilgate Forest, Sussex, southern England. © Sven Sachs, Jahn J. Hornung · CC BY 2.5 · Wikimedia
PBDB ↗ Wikipedia ↗
Classification
Dinosauria Unranked clade
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Ornithischia Unranked clade
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Parapredentata Unranked clade
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Saphornithischia Unranked clade
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Prionodontia Unranked clade
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Genasauria Unranked clade
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Thyreophora Unranked clade
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Thyreophoroidea Superfamily
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Eurypoda Unranked clade
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Ankylosauria Unranked clade
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Euankylosauria Unranked clade
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Nodosauridae Family
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Hylaeosaurus Genus
Measurements
Length
6 m ⓘ
Hylaeosaurus armatus
5 m ⓘ
Mass
2 500 kg ⓘ
Hylaeosaurus armatus
Fossil sites 10 geolocated sites
Distribution
Top countries
🇬🇧 United Kingdom
8
🇩🇪 Germany
1
🇫🇷 France
1
Geological formations
Tunbridge Wells Sand
3
Bückeberg
1
Ashdown
1
Wadhurst Clay
1
Weald Clay
1
Temporal distribution
Albian (113.2–100.5 Ma)
1
Barremian (125.77–121.4 Ma)
1
Hauterivian (132.6–125.77 Ma)
1
Valanginian (137.05–132.6 Ma)
5
Berriasian (143.1–137.05 Ma)
2
Species (2)
Hylaeosaurus armatus 137 Ma
Hylaeosaurus oweni subjective synonym of Hylaeosaurus armatus 137 Ma
Images 1
Bibliography
Original description
G. A. Mantell. 1833. The Geology of the South-East of England DOI ↗
Bibliography (8)
S. Sachs and J. J. Hornung. 2013. Ankylosaur remains from the Early Cretaceous (Valanginian) of northwestern Germany. PLoS One 8(4):e60571:1-7 DOI ↗
P. Austen, D. Brockhurst, and K. Honeysett. 2010. Vertebrate fauna from Ashdown Brickworks, Bexhill, East Sussex. Wealden News (8):13-23
P. M. Galton. 2009. Notes on Neocomian (Lower Cretaceous) ornithopod dinosaurs from England - Hypsilophodon, Valdosaurus, "Camptosaurus", "Iguanodon" - and referred specimens from Romania and elsewhere. Revue de Paléobiologie, Genève 28(1):211-273
W. P. Coombs. 1978. The families of the ornithischian dinosaur order Ankylosauria. Palaeontology 21(1):143-170
R. Lydekker. 1888. Catalogue of the Fossil Reptilia and Amphibia in the British Museum (Natural History). Part I. Containing the Orders Ornithosauria, Crocodilia, Dinosauria, Squamata, Rhynchocephalia, and Proterosauria. British Museum (Natural History), London DOI ↗
C. Barrois. 1875. Les reptiles du terrain crétacé du N.-E. du bassin de Paris [The reptiles of the Cretaceous terrain of the NE of the Paris Basin]. Bulletin Scientifique, Historique et Littéraire du Département du Nord et des Pays Voisins 7(4–5):73-83
R. Damon. 1860. Handbook to the Geology of Weymouth and the Island of Portland. With Notes on the Natural History of the Coast and Neighbourhood. Edward Stanford, London DOI ↗
G. A. Mantell. 1854. The Medals of Creation; or, First Lessions in Geology, and the Study of Organic Remains 2:447-930 DOI ↗