Coelosaurus Facts
Pronunciation: SEE-low-SORE-us
Name meaning: Hollow Lizard
| Diet | Carnivore |
| Height | Unknown |
| Length | Unknown |
| Environment | Land |
| Era | Cretaceous |
| Period | Late Cretaceous |
| Type | Theropod |
| Location | North America |
Coelosaurus antiquus represents one of palaeontology's many puzzling cases - a theropod dinosaur known from such fragmentary remains that scientists cannot determine what it actually was. Named by American palaeontologist Joseph Leidy in 1865, this creature is based solely on two incomplete tibiae (shin bones) discovered in the Navesink Formation of New Jersey.
Living during the Late Cretaceous period around 72 million years ago, Coelosaurus inhabited the eastern coastal regions of what is now North America. At this time, much of New Jersey was covered by shallow seas, with Coelosaurus likely living along the coastlines and river deltas of this ancient marine environment.
As a theropod, Coelosaurus would have been a bipedal carnivore, but beyond this basic classification, almost everything about this dinosaur remains a mystery. The hollow nature of the shin bones, which inspired its name meaning 'hollow lizard', was typical of many theropod dinosaurs and doesn't provide enough information to distinguish it from other species of the time.
Today, most palaeontologists consider Coelosaurus a nomen dubium - a doubtful name - because the fossil evidence is simply too incomplete to justify it as a distinct species. The bones might belong to a known theropod species, or represent a creature too poorly preserved to ever properly identify.
What made Coelosaurus distinctive?
The only known fossils are two incomplete shin bones with hollow internal structure typical of theropod dinosaurs. No distinctive features can be identified from such limited remains.
Behaviour
With only fragmentary shin bones preserved, no specific behaviours can be determined for Coelosaurus. As a theropod, it would likely have been a bipedal predator, but its hunting methods, social behaviour, and lifestyle remain completely unknown.
Discovery
Coelosaurus was first described by Joseph Leidy in 1865. The original fossils were discovered at Navesink Formation, New Jersey, USA.
Coelosaurus FAQ
What did Coelosaurus eat?
As a theropod dinosaur, Coelosaurus would have been carnivorous, likely hunting fish, smaller dinosaurs, or other animals in its coastal environment. However, with only shin bone fragments preserved, we cannot determine its specific diet or hunting methods.
How big was Coelosaurus?
The size of Coelosaurus is completely unknown because only two incomplete shin bones have been found. Without more complete skeletal remains, palaeontologists cannot estimate its height, length, or weight.
When did Coelosaurus live?
Coelosaurus lived during the
Late Cretaceous period, approximately 72 million years ago, based on the geological age of the Navesink Formation where its fossils were discovered.
Where was Coelosaurus found?
Coelosaurus fossils were discovered in the Navesink Formation of New Jersey, USA. This area was a coastal marine environment during the
Late Cretaceous period.
How do you pronounce Coelosaurus?
Coelosaurus is pronounced 'SEE-low-SORE-us', with emphasis on the first syllable. The name comes from Greek words meaning 'hollow lizard'.
What does Coelosaurus mean?
Coelosaurus means 'hollow lizard' in Greek, referring to the hollow internal structure observed in the shin bones. This hollow bone structure was typical of theropod dinosaurs.
How fast could Coelosaurus run?
The running speed of Coelosaurus cannot be determined because only fragmentary shin bones have been preserved. Speed estimates require more complete leg and body fossil remains.
What type of dinosaur was Coelosaurus?
Coelosaurus was classified as a theropod dinosaur, the group that includes all bipedal carnivorous dinosaurs. However, it's considered a nomen dubium because the fossils are too incomplete to confirm its validity as a distinct species.
Was Coelosaurus related to birds?
As a theropod dinosaur, Coelosaurus would have been related to birds, since birds evolved from theropod dinosaurs. However, the fragmentary nature of its fossils makes it impossible to determine its specific relationships within the theropod family tree.
How many Coelosaurus fossils have been found?
Very few Coelosaurus fossils have been found - the original species description was based on just two incomplete tibiae (shin bones) discovered in 1865, and no significant additional remains have been definitively attributed to this species since then.
