Craterosaurus Facts
Pronunciation: CRAY-ter-oh-SORE-us
Name meaning: Bowl Lizard
| Diet | Herbivore |
| Height | 1.8m |
| Length | 4m |
| Weight | 560 kg |
| Environment | Land |
| Era | Cretaceous |
| Period | Early Cretaceous |
| Type | Stegosaur |
| Location | England |
Craterosaurus is one of palaeontology's most enigmatic dinosaurs, known from frustratingly little evidence. This stegosaur lived during the Early Cretaceous period, around 121 million years ago, in what is now England. Unfortunately, only a single partial vertebra has ever been found, making Craterosaurus one of the most poorly understood dinosaurs ever described.
Based on the limited fossil evidence and comparisons with other stegosaurs, scientists estimate that Craterosaurus measured approximately 4 metres in length and weighed around 560 kilograms. Like other stegosaurs, it would have been a quadrupedal herbivore, using its beak-like mouth to strip vegetation from plants. The creature likely possessed the characteristic double row of plates or spikes along its back, though this cannot be confirmed from the single vertebra.
The fragmentary nature of the fossil evidence has led many palaeontologists to question whether Craterosaurus is actually a valid genus at all. Some experts suggest it may be a junior synonym of Regnosaurus, another poorly known Early Cretaceous dinosaur from England. The lack of distinctive features in the vertebra makes it nearly impossible to determine what truly set Craterosaurus apart from its relatives.
Despite these uncertainties, Craterosaurus represents an important piece of the puzzle in understanding dinosaur diversity in Early Cretaceous Britain, a time and place where stegosaurs were becoming increasingly rare as other armoured dinosaurs began to dominate.
What made Craterosaurus distinctive?
No distinctive features can be identified from the single partial vertebra that represents the only known fossil of Craterosaurus. The vertebra shows typical stegosaur characteristics but lacks any unique identifying features.
Behaviour
Based on its classification as a stegosaur, Craterosaurus would likely have been a slow-moving browser, feeding on low-growing plants and ferns. It probably used its tail spikes for defence against predators, though specific behavioural details remain unknown due to the extremely limited fossil evidence.
Discovery
Craterosaurus was first described by Harry Govier Seeley in 1874. The original fossils were discovered at Woburn Sands Formation, Bedfordshire, England.
Craterosaurus FAQ
What did Craterosaurus eat?
Craterosaurus was a herbivore that would have fed on the plants available during the
Early Cretaceous period, including ferns, cycads, and early flowering plants. Like other stegosaurs, it probably used its beak-like mouth to strip vegetation and had small teeth suitable for processing plant matter.
How big was Craterosaurus?
Craterosaurus is estimated to have been about 4 metres long and weighed approximately 560 kilograms. However, these measurements are educated guesses based on comparisons with other stegosaurs, as only a single partial vertebra has been found.
When did Craterosaurus live?
Craterosaurus lived during the
Early Cretaceous period, approximately 121.4 million years ago. This makes it one of the younger stegosaurs, living at a time when this group was becoming less common.
Where was Craterosaurus found?
The only known Craterosaurus fossil was discovered in the Woburn Sands Formation in Bedfordshire, England. This geological formation has yielded several
Early Cretaceous dinosaur remains, though most are fragmentary.
How do you pronounce Craterosaurus?
Craterosaurus is pronounced 'CRAY-ter-oh-SORE-us', with emphasis on the first syllable of each part of the name.
What does Craterosaurus mean?
Craterosaurus means 'Bowl Lizard' in reference to a bowl-like depression found in the partial vertebra that represents the only known fossil of this dinosaur.
How fast could Craterosaurus run?
The speed of Craterosaurus is unknown, but like other stegosaurs, it was probably a slow-moving animal. Its heavy build and quadrupedal stance would have made it unsuited for running, relying instead on its armoured defences.
What type of dinosaur was Craterosaurus?
Craterosaurus was classified as a stegosaur, the group of armoured dinosaurs known for having rows of plates and spikes along their backs and tails. However, its exact family relationships remain uncertain due to the limited fossil evidence.
Was Craterosaurus related to birds?
No, Craterosaurus was not closely related to birds. As a stegosaur, it belonged to the ornithischian dinosaurs, whilst birds evolved from theropod dinosaurs in the saurischian group. These two major dinosaur groups split very early in dinosaur evolution.
How many Craterosaurus fossils have been found?
Only one Craterosaurus fossil has ever been found - a single partial vertebra discovered in 1874. This extremely limited fossil record makes it one of the most poorly known dinosaurs and has led many scientists to question whether it represents a valid species.
