Quilmesaurus Facts
Pronunciation: KEEL-mes-SORE-us
Name meaning: Quilmes Lizard (named after the Quilmes people of Argentina)
| Diet | Carnivore |
| Height | 1.5m |
| Length | 5m |
| Weight | 500 kg |
| Environment | Land |
| Era | Cretaceous |
| Period | Late Cretaceous |
| Type | Theropod |
| Location | Argentina |
Quilmesaurus was a carnivorous theropod dinosaur that lived during the Late Cretaceous period, approximately 72 million years ago, in what is now Argentina. This predator belonged to a group of distinctive South American theropods known for their unusual skull features and robust build, though the fragmentary nature of Quilmesaurus fossils means we know relatively little about its specific appearance.
The dinosaur inhabited the ancient landscapes of Patagonia during a time when South America was an island continent, isolated from other landmasses. This isolation led to the evolution of unique dinosaur fauna, including several related theropod species that dominated the region's ecosystems as apex predators.
Like its better-known relatives, Quilmesaurus was almost certainly a formidable hunter that walked on two powerful legs. Its diet would have consisted of other dinosaurs and various prey animals that shared its environment. The leg bones that have been discovered suggest it was a medium-sized predator, built for both power and mobility.
However, the scientific validity of Quilmesaurus remains uncertain. The fossil remains consist only of leg bones that, whilst clearly belonging to this group of theropods, lack the distinctive features needed to confidently establish it as a separate genus. This has led some palaeontologists to question whether these bones might actually belong to another, already known species.
What made Quilmesaurus distinctive?
Based on the limited leg bone fossils, Quilmesaurus appears to have had robust, powerful limbs typical of its theropod family. However, the fragmentary remains lack unique identifying features that would clearly distinguish it from related species.
Behaviour
As a theropod predator, Quilmesaurus likely hunted other dinosaurs and smaller prey in the Late Cretaceous forests and plains of Argentina. It probably relied on powerful leg muscles for both pursuing prey and delivering devastating kicks during attacks.
Discovery
Quilmesaurus was first described by Rodolfo Coria in 2001. The original fossils were discovered at Allen Formation, Río Negro Province, Argentina.
Quilmesaurus FAQ
What did Quilmesaurus eat?
Quilmesaurus was a carnivore that hunted other dinosaurs and various prey animals. As a theropod predator, it would have used its powerful legs and sharp teeth to catch and kill its prey in the
Late Cretaceous ecosystems of Argentina.
How big was Quilmesaurus?
Based on the fragmentary leg bone fossils, Quilmesaurus is estimated to have been about 5 metres long, stood roughly 1.5 metres tall at the hip, and weighed approximately 500 kilograms. However, these estimates are uncertain due to the incomplete fossil record.
When did Quilmesaurus live?
Quilmesaurus lived during the
Late Cretaceous period, approximately 72.2 million years ago. This was near the end of the age of dinosaurs, just before the mass extinction event that ended their reign.
Where was Quilmesaurus found?
Quilmesaurus fossils were discovered in the Allen Formation in Río Negro Province, Argentina. This region of Patagonia has yielded many important dinosaur discoveries from the
Late Cretaceous period.
How do you pronounce Quilmesaurus?
Quilmesaurus is pronounced 'KEEL-mes-SORE-us'. The name comes from the Quilmes people of Argentina combined with the Greek word 'saurus' meaning lizard.
What does Quilmesaurus mean?
Quilmesaurus means 'Quilmes Lizard', named after the Quilmes people, an indigenous group from northwestern Argentina. This name honours the cultural heritage of the region where the fossils were discovered.
How fast could Quilmesaurus run?
The running speed of Quilmesaurus is unknown due to the fragmentary nature of the fossils. However, as a theropod with powerful leg bones, it was likely capable of quick bursts of speed when hunting prey.
What type of dinosaur was Quilmesaurus?
Quilmesaurus was a theropod dinosaur, specifically belonging to the Abelisauridae family. Theropods were bipedal, primarily carnivorous dinosaurs that included famous predators and eventually gave rise to modern birds.
Was Quilmesaurus related to birds?
Yes, as a theropod dinosaur, Quilmesaurus was distantly related to modern birds. All theropods, including Quilmesaurus, share a common ancestor with birds, though this particular species was not directly on the evolutionary line leading to birds.
How many Quilmesaurus fossils have been found?
Very few Quilmesaurus fossils have been found - only leg bones have been discovered so far. This limited fossil material makes it difficult to fully understand this dinosaur and has led to questions about whether it represents a distinct species.
