Achillesaurus Facts
Pronunciation: ah-KILL-ee-SORE-us
Name meaning: Achilles Lizard
| Diet | Carnivore |
| Height | 0.5m |
| Length | 1.2m |
| Weight | 3 kg |
| Environment | Land |
| Era | Cretaceous |
| Period | Late Cretaceous |
| Type | Theropod |
| Location | Argentina |
Achillesaurus was a small but fascinating theropod dinosaur that lived in what is now Argentina during the Late Cretaceous period, approximately 85.7 million years ago. This diminutive predator belonged to a highly specialised group of theropods known for their unusual adaptations and bird-like characteristics.
Standing only about half a metre tall at the hip and measuring roughly 1.2 metres in length, Achillesaurus was built for a very different lifestyle than its larger theropod relatives. Like other members of its family, it possessed remarkably powerful forelimbs with enlarged claws, which were likely used for digging and breaking into insect nests, particularly termite mounds and ant colonies.
The discovery of Achillesaurus in the Bajo de la Carpa Formation has provided valuable insights into the diversity of small theropods in South America during the Cretaceous. Its fossils suggest it was well-adapted to a specialised ecological niche, using its robust arms and claws to access protein-rich insect colonies that other predators couldn't reach.
As a theropod, Achillesaurus was bipedal and likely quite agile, moving quickly across the ancient landscapes of Patagonia in search of its preferred prey. Its small size and specialised feeding adaptations made it an important part of the Late Cretaceous ecosystem.
What made Achillesaurus distinctive?
Achillesaurus possessed characteristically robust and powerful forelimbs with enlarged claws, typical of its specialised family. Its small, compact body and relatively long legs suggest it was built for both agility and the specialised task of breaking into insect colonies.
Behaviour
Achillesaurus likely spent much of its time foraging for insect colonies, using its powerful claws to break open termite mounds and ant nests. Its small size would have allowed it to move quickly between feeding sites and escape larger predators in its environment.
Discovery
Achillesaurus was first described by Martinelli and Vera in 2010. The original fossils were discovered at Bajo de la Carpa Formation, Rio Negro, Argentina.
Achillesaurus FAQ
What did Achillesaurus eat?
Achillesaurus was a carnivore that specialised in eating insects, particularly ants and termites. It used its powerful claws to break open insect colonies and access the protein-rich contents inside.
How big was Achillesaurus?
Achillesaurus was quite small, standing about 0.5 metres tall at the hip and measuring approximately 1.2 metres in total length. It weighed around 3 kilograms, making it about the size of a modern turkey.
When did Achillesaurus live?
Achillesaurus lived during the
Late Cretaceous period, specifically around 85.7 million years ago during the Santonian age. This was towards the end of the age of dinosaurs.
Where was Achillesaurus found?
Achillesaurus fossils were discovered in Argentina, specifically in the Bajo de la Carpa Formation in Rio Negro province. This region of Patagonia has yielded many important dinosaur discoveries.
How do you pronounce Achillesaurus?
Achillesaurus is pronounced 'ah-KILL-ee-SORE-us', with emphasis on the second syllable, similar to the pronunciation of the Greek hero Achilles followed by 'saurus'.
What does Achillesaurus mean?
Achillesaurus means 'Achilles Lizard', named after the legendary Greek hero Achilles. The name likely refers to the dinosaur's powerful forelimbs and claws, reminiscent of the hero's strength.
How fast could Achillesaurus run?
The running speed of Achillesaurus is not precisely known, but its long legs relative to its body size suggest it was probably quite agile and capable of quick bursts of speed when needed.
What type of dinosaur was Achillesaurus?
Achillesaurus was a theropod dinosaur, specifically a member of the Alvarezsauridae family. These were small, specialised theropods known for their powerful arms and insect-eating lifestyle.
Was Achillesaurus related to birds?
Yes, as a theropod dinosaur, Achillesaurus was part of the group that gave rise to modern birds. Its family was particularly bird-like, with many advanced features that would later be seen in early birds.
How many Achillesaurus fossils have been found?
Achillesaurus is known from limited fossil material from the type specimen. Like many small dinosaurs, complete fossils are rare, but the remains found were sufficient to identify it as a new species.
