Cruxicheiros Facts
Pronunciation: CROO-see-KY-ros
Name meaning: Cross Hand
| Diet | Carnivore |
| Height | 0.5m |
| Length | 1.5m |
| Weight | 10 kg |
| Environment | Land |
| Era | Jurassic |
| Period | Middle Jurassic |
| Type | Theropod |
| Location | England |
Cruxicheiros was a small theropod dinosaur that lived during the Middle Jurassic period, approximately 168 million years ago, in what is now England. This relatively recent discovery has provided valuable insights into the diversity of predatory dinosaurs that roamed Britain during the Jurassic period.
Known primarily from fragmentary remains found in the Chipping Norton Limestone Formation of Oxfordshire, Cruxicheiros was a modest-sized predator that likely stood about half a metre tall at the hip and measured roughly 1.5 metres in total length. Like other theropods, it walked on two legs and possessed sharp claws and teeth adapted for catching and consuming prey.
As a carnivore, Cruxicheiros would have hunted smaller animals in its coastal environment, which during the Middle Jurassic was characterised by shallow seas and lagoons. The limestone formation where it was discovered suggests it lived in a warm, tropical climate with abundant marine life nearby, though it remained a terrestrial hunter.
The discovery of Cruxicheiros has helped palaeontologists better understand the theropod dinosaur fauna of Middle Jurassic Britain, a time period that was previously less well-represented in the fossil record. Its classification within the broader theropod family tree remains uncertain due to the fragmentary nature of the fossils.
What made Cruxicheiros distinctive?
Cruxicheiros is known from limited fossil material, making its distinguishing features difficult to determine with certainty. The available remains suggest it was a small, lightly-built theropod with the typical bipedal stance and predatory adaptations of its group.
Behaviour
Based on its small size and theropod anatomy, Cruxicheiros likely hunted smaller prey such as early mammals, lizards, and possibly fish in its coastal environment. It would have been an active predator, using its speed and agility to catch prey rather than relying on size and strength.
Discovery
Cruxicheiros was first described by Roger Benson and Jonathan Radley in 2010. The original fossils were discovered at Chipping Norton Limestone Formation, Oxfordshire, England.
Cruxicheiros FAQ
What did Cruxicheiros eat?
Cruxicheiros was a carnivore that hunted smaller animals in its coastal
Middle Jurassic environment. Its diet likely included early mammals, lizards, fish, and other small vertebrates that shared its habitat. Like other theropods, it had sharp teeth and claws perfectly adapted for catching and consuming meat.
How big was Cruxicheiros?
Cruxicheiros was a relatively small theropod dinosaur, standing approximately 0.5 metres tall at the hip and measuring about 1.5 metres in total length. It weighed roughly 10 kilograms, making it similar in size to a large dog. These estimates are based on fragmentary remains, so the exact size remains somewhat uncertain.
When did Cruxicheiros live?
Cruxicheiros lived during the
Middle Jurassic period, approximately 168.2 million years ago. This places it in a time when dinosaurs were diversifying rapidly and the climate was warm and tropical across much of what is now Europe.
Where was Cruxicheiros found?
Cruxicheiros was discovered in England, specifically in the Chipping Norton Limestone Formation in Oxfordshire. The limestone deposits where it was found formed in ancient shallow seas and lagoons, indicating that this dinosaur lived in a coastal environment during the
Middle Jurassic.
How do you pronounce Cruxicheiros?
Cruxicheiros is pronounced 'CROO-see-KY-ros'. The name comes from Latin and Greek roots, with 'crux' meaning cross and 'cheiros' meaning hand, referring to distinctive features in the fossil hand bones.
What does Cruxicheiros mean?
Cruxicheiros means 'cross hand' in Latin and Greek. This name was chosen by the scientists who described it because of distinctive cross-like features they observed in the fossilised hand bones that helped distinguish it as a new species.
How fast could Cruxicheiros run?
The running speed of Cruxicheiros is not known with certainty due to the limited fossil material available. However, as a small, lightly-built theropod, it was likely quite agile and capable of quick bursts of speed when hunting prey or escaping danger.
What type of dinosaur was Cruxicheiros?
Cruxicheiros was a theropod dinosaur, belonging to the group of bipedal, predominantly carnivorous dinosaurs that includes famous predators like
Tyrannosaurus and
Allosaurus. However, its exact family relationships within the theropod group remain uncertain due to the fragmentary nature of the fossil evidence.
Was Cruxicheiros related to birds?
Yes, as a theropod dinosaur, Cruxicheiros was part of the group from which modern birds evolved. All theropods, including Cruxicheiros, share common ancestry with birds, though Cruxicheiros itself was not a direct ancestor of modern birds but rather a side branch of the theropod family tree.
How many Cruxicheiros fossils have been found?
Cruxicheiros is known from relatively few fossil specimens, primarily fragmentary remains from the type specimen described in 2010. The limited fossil material makes it challenging to fully understand this dinosaur's anatomy and behaviour, highlighting the importance of any future discoveries.
