Heterodontosaurus Facts
Pronunciation: HET-er-oh-DONT-oh-SORE-us
Name meaning: Different Toothed Lizard
| Diet | Omnivore |
| Height | 0.5m |
| Length | 1.2m |
| Weight | 3 kg |
| Environment | Land |
| Era | Jurassic |
| Period | Early Jurassic |
| Type | Ornithopod |
| Location | South Africa |
Heterodontosaurus was a small, early ornithopod dinosaur that lived during the Early Jurassic period, approximately 200 million years ago in what is now South Africa. This turkey-sized dinosaur was one of the earliest members of the ornithischian group and represents a fascinating example of early dinosaur diversity during the Jurassic period.
What made Heterodontosaurus truly remarkable was its unusual dental arrangement, which gave the dinosaur its name meaning 'different toothed lizard'. Unlike most dinosaurs that had uniform teeth, Heterodontosaurus possessed three distinct types of teeth in its jaws: small cutting incisors at the front, prominent canine-like tusks, and grinding cheek teeth at the back. This heterodont dentition was highly unusual for plant-eating dinosaurs and suggests a more varied diet than typical herbivores.
Standing about half a metre tall and measuring roughly 1.2 metres in length, Heterodontosaurus was built for speed and agility. Its long, powerful hind legs indicate it was primarily bipedal, though it may have occasionally moved on all fours when feeding. The dinosaur's hands were equipped with strong claws, likely used for grasping food and possibly digging for roots or tubers.
The discovery of Heterodontosaurus has provided crucial insights into early ornithopod evolution and feeding strategies. Its mixed dentition suggests it may have been omnivorous, possibly supplementing a plant-based diet with insects, small animals, or eggs when available, making it quite different from the strict herbivores that most ornithopods would later become.
What made Heterodontosaurus distinctive?
Heterodontosaurus had three distinct types of teeth including prominent canine-like tusks, which was highly unusual for plant-eating dinosaurs. It possessed long, powerful hind legs built for running and strong clawed hands for grasping food.
Behaviour
Heterodontosaurus was likely a fast-moving, agile dinosaur that could run on its hind legs to escape predators. Its varied tooth types suggest it may have had opportunistic feeding behaviour, using its tusks for defence or social displays whilst employing its different teeth to process a wide variety of food sources.
Discovery
Heterodontosaurus was first described by Alfred Walter Crompton and Alan Charig in 1962. The original fossils were discovered at Elliot Formation, Cape Province, South Africa.
Heterodontosaurus FAQ
What did Heterodontosaurus eat?
Heterodontosaurus was likely omnivorous, with its varied tooth types allowing it to eat both plants and small animals. Its sharp front teeth and tusks could tear meat or tough plant material, whilst its grinding cheek teeth processed vegetation, seeds, and possibly insects or small prey when available.
How big was Heterodontosaurus?
Heterodontosaurus was quite small, standing about 50 centimetres tall at the hip and measuring approximately 1.2 metres in total length. It weighed around 3 kilograms, making it roughly the size of a large turkey or small dog.
When did Heterodontosaurus live?
Heterodontosaurus lived during the
Early Jurassic period, approximately 201 to 193 million years ago. This was relatively early in dinosaur evolutionary history, making Heterodontosaurus one of the earliest known ornithischian dinosaurs.
Where was Heterodontosaurus found?
Heterodontosaurus fossils have been discovered in South Africa, specifically in the Elliot Formation of the Cape Province. The first skull was found in 1962, followed by an almost complete skeleton in 1966, providing excellent insight into this early dinosaur's anatomy.
How do you pronounce Heterodontosaurus?
Heterodontosaurus is pronounced 'HET-er-oh-DONT-oh-SORE-us', with emphasis on the first, third, and fifth syllables. The name breaks down into 'hetero' meaning different, 'dont' meaning tooth, and 'saurus' meaning lizard.
What does Heterodontosaurus mean?
Heterodontosaurus means 'different toothed lizard' in reference to its unusual heterodont dentition. Unlike most dinosaurs with uniform teeth, Heterodontosaurus had three distinct types: cutting incisors, canine-like tusks, and grinding cheek teeth.
How fast could Heterodontosaurus run?
Whilst the exact running speed of Heterodontosaurus is unknown, its long, powerful hind legs suggest it was built for speed and could likely run quite fast to escape predators. Its lightweight build and bipedal stance would have made it an agile runner.
What type of dinosaur was Heterodontosaurus?
Heterodontosaurus was an early ornithopod dinosaur, belonging to the larger group of ornithischian or 'bird-hipped' dinosaurs. It was a member of the Heterodontosauridae family and represents one of the most primitive ornithopods known to science.
Was Heterodontosaurus related to birds?
No, Heterodontosaurus was not directly related to birds. It belonged to the ornithischian lineage, whilst birds evolved from theropod dinosaurs in the saurischian lineage. However, all dinosaurs share common ancestry, so there is a distant evolutionary relationship.
How many Heterodontosaurus fossils have been found?
Several Heterodontosaurus specimens have been discovered since the first skull in 1962, including an almost complete skeleton found in 1966. Whilst not as common as some dinosaurs, enough material has been found to give paleontologists a good understanding of its anatomy and lifestyle.
