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DURIAVENATOR

a meat-eating megalosaurid theropod dinosaur from the Middle Jurassic of England.
duriavenator.png
Pronunciation: doo-REE-a-veh-NAY-tuhr
Meaning: Dorset Hunter
Author/s: Benson (2008)
Synonyms: Megalosaurus hesperis
First Discovery: Dorset, UK
Discovery Chart Position: #656

Duriavenator hesperis

The remains that would become Duriavenator were initially assigned to Megalosaurus bucklandi by Richard Owen in 1883. But they were used to raise a new species, Megalosaurus hesperis, by Waldman in 1974 because he, and Alick Walker before him, had an issue with its teeth. Tooth counting is not a bad way to separate carnivorous saurischians, and BMNH R.332 has way more teeth in both its upper and lower jaws than Megalosaurus bucklandi. But both its jaws and teeth also sport several features that are lacking in the critter that they were long assigned to, so Roger Benson severed their ties with Megalosaurus altogether in 2008 and gave them a brand-spanking new name—Duriavenator—"Dorset Hunter".

Strangely for an apex predator, Duriavenator was almost highjacked by a pesky human in the form of a friend of the late Sam Welles, who claimed that these very same fossils had already been renamed "Walkersaurus", the problem being: an official description in a peer-reviewed publication, which would have cemented its name on the roll call of dinosaurs, never actually materialised. Stranger still, the tooth count of Duriavenator is closest to Zanclodon cambrensis from Bridgend in Wales, which has spent seventeen decades being nudged all over the archosaurian family tree but may be a Triassic-aged crocodile ancestor.
(Western Dorset hunter)Etymology
Duriavenator is derived from "Duria" (an old name for Dorset) and the Latin "venator" (hunter). Not to be confused with a type of perennial herb with nocturnally fragrant flowers of the same name, the species epithet hesperis—a derivation of "hesperos" (western, of the west)—presumably refers to its discovery in the west (well, north-west) of Dorset.
Discovery
The remains of Duriavenator were discovered in the Inferior Oolite "on the north side of Cold Harbour Road", Sherborne, Dorset, UK, by a chap known only as "a friend of Mr. Edward Cleminshaw" in 1914. The holotype (BMNH R.332) is a partial skull.
Estimations
Timeline:
Era: Mesozoic
Epoch: Middle Jurassic
Stage: Bajocian
Age range: 171-167 mya
Stats:
Est. max. length: 7 meters
Est. max. hip height: ?
Est. max. weight: 250 Kg
Diet: Carnivore
Duriavenator
hesperis
References
• Owen R (1883) "On the skull of Megalosaurus". Quarterly Journal of the Geological Society, 39(1–4): 334–347. DOI: 10.1144/GSL.JGS.1883.039.01-04.22.
• Richardson L (1915) "On the stratigraphical distribution of the Inferior Oolite vertebrates of the Cotteswold Hills and the Bath - Burton Bradstock district". Geol. Mag., Vol. VII: 272-274.
• Walker AD (1964) "Triassic reptiles from the Elgin area: Ornithosuchus and the origin of carnosaurs". Philosophical Transactions of the Royal Society of London, B, 248(744): 53-134. DOI: 10.1098/rstb.1964.0009.
• Waldman M (September 1974) "Megalosaurids from the Bajocian (M.Jurassic) of Dorset". Palaeontology, 17(2): 325-339.
• Paul GS (1988) "Predatory Dinosaurs of the World".
• Molnar RE, Kurzanov SM and Zhiming D (1990) "Carnosauria". Page 203–205 in Weishampel, Osmólska and Dodson (eds.) "The Dinosauria: First Edition".
• Benson RBJ (2008) "A redescription of 'Megalosaurus' hesperis from the Inferior Oolite (Bajocian, Middle Jurassic) of Dorset, United Kingdom". Zootaxa, 1931(1): 57-67.
• Holtz TR, Molnar RE and Currie PJ (2004) "Basal Tetanurae" in Weishampel, Dodson and Osmólska (eds.) "The Dinosauria: Second Edition".
• Hendrickx C, Mateus O and Araújo R (2014) "The dentition of megalosaurid theropods". Acta Palaeontologica Polonica, 60 (3): 627-642.
• Lomax DR (2014) "Dinosaurs of the British Isles".
• Paul GS (2016) "The Princeton Field Guide to Dinosaurs: Second Edition".
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To cite this page:
Atkinson, L. "DURIAVENATOR :: from DinoChecker's dinosaur archive".
›. Web access: 06th Mar 2026.
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