Propanoplosaurus Facts
Pronunciation: pro-PAN-oh-plo-SORE-us
Name meaning: Forward Armoured Lizard
| Diet | Herbivore |
| Height | 0.15m |
| Length | 0.4m |
| Weight | 500 g |
| Environment | Land |
| Era | Cretaceous |
| Period | Early Cretaceous |
| Type | Ankylosaur |
| Location | North America |
Propanoplosaurus was a tiny ankylosaur that lived during the Early Cretaceous period, approximately 119.57 million years ago, in what is now Maryland, USA. This diminutive armoured dinosaur represents one of the smallest known members of its group, making it particularly fascinating for scientists studying the evolution and diversity of ankylosaurs.
What makes Propanoplosaurus truly remarkable is that it is known from the fossil remains of a hatchling - a baby dinosaur that would have been incredibly small when it died. The specimen measures just 40 centimetres in length and would have stood only 15 centimetres tall, weighing approximately 500 grams. Even accounting for its juvenile status, Propanoplosaurus would have been a notably small ankylosaur when fully grown.
Like other ankylosaurs, Propanoplosaurus was a herbivore that fed on low-growing plants, ferns, and other vegetation available in the Early Cretaceous forests of eastern North America. Its body would have been covered in bony plates and possibly small spikes for protection against predators, though the exact arrangement of its armour is not fully known from the juvenile specimen.
The discovery of Propanoplosaurus has provided valuable insights into the early development of ankylosaurs and demonstrates that these armoured dinosaurs were more diverse in size than previously thought, with some species remaining quite small throughout their lives.
What made Propanoplosaurus distinctive?
Propanoplosaurus was distinguished by its exceptionally small size, even for an ankylosaur, with the known hatchling specimen measuring just 40 centimetres long. As a nodosaurid ankylosaur, it would have lacked the distinctive tail club found in ankylosaurids, instead having a body covered in bony armour plates and possibly small spikes.
Behaviour
As a hatchling ankylosaur, the young Propanoplosaurus would have been vulnerable to predators and likely stayed close to vegetation for cover while feeding on small plants and ferns. Like other ankylosaurs, it probably had a relatively slow lifestyle, relying on its developing armour rather than speed for protection.
Discovery
Propanoplosaurus was first described by Ray Stanford in 1999. The original fossils were discovered at Patuxent Formation, Maryland, USA.
Propanoplosaurus FAQ
What did Propanoplosaurus eat?
Propanoplosaurus was a herbivore that fed on plants, ferns, cycads, and other low-growing vegetation available in the
Early Cretaceous forests of eastern North America. As a baby ankylosaur, it would have eaten tender young shoots and leaves that were easy to digest.
How big was Propanoplosaurus?
The known Propanoplosaurus specimen was a hatchling measuring 40 centimetres long and 15 centimetres tall, weighing approximately 500 grams. This makes it one of the smallest ankylosaur specimens ever discovered, though we don't know how large adults would have grown.
When did Propanoplosaurus live?
Propanoplosaurus lived during the
Early Cretaceous period, approximately 119.57 million years ago. This was a time when flowering plants were beginning to diversify and many new dinosaur species were evolving.
Where was Propanoplosaurus found?
Propanoplosaurus was discovered in the Patuxent Formation of Maryland, USA. This geological formation has yielded several important
Early Cretaceous dinosaur fossils from the eastern United States.
How do you pronounce Propanoplosaurus?
Propanoplosaurus is pronounced 'pro-PAN-oh-plo-SORE-us', with emphasis on the second syllable. The name can be broken down into parts: 'pro' (forward), 'pano' (all), 'plo' (armoured), and 'saurus' (lizard).
What does Propanoplosaurus mean?
Propanoplosaurus means 'Forward Armoured Lizard' in Greek. The name refers to the dinosaur's heavily armoured body, which was covered in bony plates and spikes for protection against predators.
How fast could Propanoplosaurus run?
The speed of Propanoplosaurus is unknown, but like other ankylosaurs, it was likely quite slow-moving. These heavily armoured dinosaurs relied on their defensive plating rather than speed to avoid predators.
What type of dinosaur was Propanoplosaurus?
Propanoplosaurus was an ankylosaur, specifically a member of the nodosaurid family. Ankylosaurs were heavily armoured, plant-eating dinosaurs that walked on four legs and were covered in bony plates and spikes.
Was Propanoplosaurus related to birds?
Propanoplosaurus was not closely related to birds. As an ankylosaur, it belonged to the ornithischian group of dinosaurs, while birds evolved from theropod dinosaurs in the saurischian group. However, all dinosaurs, including Propanoplosaurus, share a common ancestor.
How many Propanoplosaurus fossils have been found?
Only one specimen of Propanoplosaurus has been discovered - the hatchling fossil found in Maryland. This single specimen consists of a natural cast and partial natural mold, which has provided scientists with detailed information about this tiny ankylosaur.
