Austrocheirus Facts
Pronunciation: AUS-tro-KY-rus
Name meaning: Southern Hand
| Diet | Carnivore |
| Height | 0.5m |
| Length | 1.5m |
| Weight | 8 kg |
| Environment | Land |
| Era | Cretaceous |
| Period | Late Cretaceous |
| Type | Theropod |
| Location | Argentina |
Austrocheirus was a small theropod dinosaur that lived during the Late Cretaceous period, approximately 83.6 million years ago in what is now Argentina. This diminutive predator belonged to a group of lightweight, agile hunters that roamed the ancient landscapes of South America during the height of the dinosaur age.
As a member of the theropod group, Austrocheirus walked on two legs and possessed the characteristic sharp teeth and claws of a carnivore. Though only known from fragmentary remains, scientists estimate it measured around 1.5 metres in length and stood about half a metre tall at the hip, making it roughly the size of a large dog. Its relatively light build of approximately 8 kilograms suggests it was built for speed and agility rather than power.
The fossil remains of Austrocheirus were discovered in the Candeleros Formation of Argentina's Neuquén Province, an area renowned for its exceptional Late Cretaceous dinosaur fossils. The creature's name, meaning 'southern hand', reflects both its South American origins and the importance of the hand and arm bones in its identification and classification.
Like other small theropods of its time, Austrocheirus likely hunted small prey including insects, small reptiles, and possibly early mammals. Its discovery has helped palaeontologists better understand the diversity of small predatory dinosaurs that thrived in South America during the Cretaceous period.
What made Austrocheirus distinctive?
Austrocheirus was distinguished by its small, lightweight build and the specific characteristics of its hand bones that gave the dinosaur its name. The fragmentary remains show features typical of the noasaurid family, including adaptations for an agile, predatory lifestyle.
Behaviour
Austrocheirus was likely an active, agile hunter that pursued small prey across the Late Cretaceous landscapes of Argentina. Its small size and light build suggest it was a quick, opportunistic predator that may have hunted insects, small reptiles, and early mammals in its ecosystem.
Discovery
Austrocheirus was first described by Martin Ezcurra, Federico Agnolin and Fernando Novas in 2010. The original fossils were discovered at Candeleros Formation, Neuquén Province, Argentina.
Austrocheirus FAQ
What did Austrocheirus eat?
Austrocheirus was a carnivore that likely hunted small prey including insects, small reptiles, early mammals, and possibly fish. Its small size and agile build made it well-suited for catching quick, small animals rather than taking down large prey.
How big was Austrocheirus?
Austrocheirus was quite small for a dinosaur, measuring approximately 1.5 metres long and standing about 0.5 metres tall at the hip. It weighed around 8 kilograms, making it roughly the size of a large dog.
When did Austrocheirus live?
Austrocheirus lived during the
Late Cretaceous period, specifically around 83.6 million years ago. This places it in the middle portion of the Late Cretaceous, well before the mass extinction that ended the age of dinosaurs.
Where was Austrocheirus found?
Austrocheirus fossils were discovered in the Candeleros Formation in Neuquén Province, Argentina. This region is famous for its exceptionally well-preserved
Late Cretaceous dinosaur fossils and has yielded many important discoveries.
How do you pronounce Austrocheirus?
Austrocheirus is pronounced 'AUS-tro-KY-rus'. The first part 'Austro' refers to 'southern' and 'cheirus' means 'hand', so it literally means 'southern hand'.
What does Austrocheirus mean?
Austrocheirus means 'southern hand' in Greek. The name reflects both the dinosaur's South American location and the importance of hand bone fossils in identifying and classifying this species.
How fast could Austrocheirus run?
The exact speed of Austrocheirus is unknown due to limited fossil material. However, its small size, lightweight build, and long legs suggest it was likely quite fast and agile, probably capable of quick bursts of speed to catch prey or escape danger.
What type of dinosaur was Austrocheirus?
Austrocheirus was a theropod dinosaur, specifically belonging to the family Noasauridae. Theropods were bipedal, mostly carnivorous dinosaurs that included everything from tiny hunters like Austrocheirus to giant predators like
Tyrannosaurus rex.
Was Austrocheirus related to birds?
Yes, as a theropod dinosaur, Austrocheirus was part of the group that gave rise to modern birds. All theropods, including Austrocheirus, share common ancestry with birds, though Austrocheirus itself was not directly ancestral to any modern bird species.
How many Austrocheirus fossils have been found?
Austrocheirus is known from relatively fragmentary remains, primarily hand and arm bones that were crucial for its identification. Only the original specimen has been formally described, making it a rare dinosaur known from limited fossil material.
