dinochecker
Welcome to our HYLAEOSAURUS entry...
Archived dinosaurs: 788
fbtwitg+feed
Dinosaurs from A to Z
Click a letter to view...
A B C D E F G
H I J K L M N
O P Q R S T U
V W X Y Z ?

HYLAEOSAURUS

a plant-eating ankylosaurian dinosaur from the Early Cretaceous of England.
hylaeosaurus.png
Pronunciation: hi-LEE-o-SOR-us
Meaning: Forest lizard
Author/s: Mantell (1832)
Synonyms: None known
First Discovery: Sussex, England
Chart Position: 3

Hylaeosaurus armatus

Hylaeosaurus is the misfit among the three critters used by Sir Richard Owen to define the Dinosauria in 1842, not least because its holotype—unlike those of Megalosaurus and Iguanodon—was not only more than a single bone but also still encased in a sandstone block with only surface fossils available for study at the time. It was rescued from the rubble after a gunpowder explosion had demolished a quarry face in Tilgate Forest in 1832, and pencilled-in for announcement by Gideon Manell four months later to much pomp and ceremony. But, alas, his manuscript was a third too long for scientific publication, so he wrote an entire book, inserted his Hylaeosaurus paper as a standalone chapter, added the epithet "armatus" in order to be recoghised as its official author under new nomenclature rules at the advice of Henry De la Beche, and managed to get "The Geology of the South-East of England" published and on the shelves by May of 1833.

Since then, three new species have been unsuccsefully added to Hylaeosaurus all of which were previously known as something else (H. oweni (Mantell, 1844) = H. armatus, H. northhamptoni ( Romer, 1956) = Regnosaurus, and H. foxii (Coombs, 1971) = Polacanthus foxii), and it has laid claim to—and been stripped of—fragmentary fossils from mainland England, the Isle of Wight, France, Germany and Spain. Its bone-obscuring matrix has been tackled with chisel, airscribe and chemicals by workers at Londons Natural History Museum with many of the fossils being released for scrutiny. However, aside from the fact that it is an armoured dinosaur with formidable spikes, which is what Mantell told us in 1833, we're none the wiser, because if any new features revealed themselves they have yet to be officially published.
(Armoured lizard of the forest)Etymology
Hylaeosaurus is derived from the Greek "hylaios" (from the forest) and "sauros" (lizard). The name was originally explained by Mantell as meaning "forest lizard" alluding to Tilgate Forest where the first specimen was unearthed. However, he later established the use of hylaeo- as a pun for the geological term "Wealden" (meaning "wood") - which was coined in 1828 by Peter Martin for the Early Cretaceous sands and clays of southern England.
The species epithet, armatus, means "armoured" in Latin.
Discovery
The remains of Hylaeosaurus were recovered by Gideon Mantell from the Tilgate Grit Member of the Grinstead Clay Formation (Hastings Beds Group), Tilgate Forest, East Sussex, England, after quarry blasting in 1832.
The holotype, NHMUK 3775 (previously BMNH R3775) consists of a partial skull, perhaps a lower jaw, vertebrae, bot shoulder girdles and some armour plates and spines. Several other fossils from the same quarry were assumed by Mantell to belong to Hylaeosaurus too, but they can't be assigned here with any confidence.
Estimations
Timeline:
Era: Mesozoic
Epoch: Early Cretaceous
Stage: Valanginian
Age range: 140-136 mya
Stats:
Est. max. length: 5 meters
Est. max. hip height: ?
Est. max. weight: 2 tons
Diet: Herbivore
Family Tree:
Dinosauria
Ornithischia
Thyreophora
Ankylosauria
Polacanthidae
Hylaeosaurus
armatus
References
• Mantell, G.A. (1833) "The Geology of the South-east of England".
• Mantell, G.A. (1848) "The Wonders of Geology or a Familiar Exposition of Geological Phenomena".
• Koken, E (1887) "Die Dinosaurier, Crocodiliden und Sauropterygier des norddeutschen Wealden". Geologische und Palaeontologische Abhandlungen. 3: 311–420.
• Corroy, G (1922) "Les reptiles néocomiens et albiens du Bassin de Paris". Comptes Rendus de l’Académie des Sciences de Paris. 172: 1192–1194.
• Sanz, J.L. (1983) "A nodosaurid ankylosaur from the Lower Cretaceous of Salas de los Infantes (Province of Burgos, Spain)". Geobios. 16: 615–621. doi:10.1016/s0016-6995(83)80038-2.
• D. Naish and D.M. Martill (2008) "Dinosaurs of Great Britain and the role of the Geological Society of London in their discovery: Ornithischia". Journal of the Geological Society, London, Vol.165,pp. 613–623.
• Paul, G.S. (2010) "The Princeton Field Guide to Dinosaurs".
• Sven Sachs and Jahn J. Hornung (2013) "Ankylosaur Remains from the Early Cretaceous (Valanginian) of Northwestern Germany".
Email    Facebook    Twitter    Google+    Stumbleupon    Reddit    Pinterest    Delicious
Time stands still for no man, and research is ongoing. If you spot an error, or want to expand, edit or add a dinosaur, please use this form. Go here to contribute to our FAQ.
All dinos are GM free, and no herbivores were eaten during site construction!
To cite this page:
Atkinson, L. "HYLAEOSAURUS :: from DinoChecker's dinosaur archive".
›. Web access: 30th Mar 2017.
  top