Iguanacolossus
Iguanacolossus was a huge, plant-eating dinosaur that lived about 139 to 132 million years ago. It had a beak and walked on four sturdy legs, but could also stand on two legs. Its name means 'mighty iguana colossus' because it was as big as a giant iguana!12
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Fun facts
Iguanacolossus was a styracosternan, a group of iguanodont dinosaurs that often had thumb spikes.1
Its fossils were found at a site called Don's Ridge in Utah, named after the discoverer Don DeBlieux.1
Only one skeleton of Iguanacolossus has been found, including parts of the skull, backbone, and hips.1
Iguanacolossus lived during the Early Cretaceous period, when Utah was a warm, dry land with rivers and forests.1
Scientists think Iguanacolossus was about 9 meters (30 feet) long, as big as a school bus.1
It had a special sinuous (wavy) contact on its skull that is unique to this dinosaur.1
Most asked questions about Iguanacolossus
?How big was Iguanacolossus?
It was about 9 metres (30 feet) long and weighed around 5 tonnes (11,000 pounds), about as big as a school bus.4
?What did Iguanacolossus eat?
It was a plant-eater. It had a beak and teeth shaped like shields and lozenges for chewing tough plants.4
?When did Iguanacolossus live?
It lived during the Early Cretaceous period, about 139 to 132 million years ago.4
?Is Iguanacolossus a dinosaur?
Yes, it is a dinosaur. It was an iguanodontian ornithopod, a type of plant-eating dinosaur.4
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For dino experts
- Scientific name
- Iguanacolossus
- Named by
- McDonald et al. 20105
- Group
- Beaked plant-eaters
- Family / clade
- Styracosterna5
- Classification
- Ornithischia > Ornithopoda > Iguanodontia5
- Age of the rocks
- 139 to 133 million years (Berriasian / Valanginian)5
- Rock formations
- Cedar Mountain5
- Countries
- USA5
- Fossil records
- 2 in the Paleobiology Database5
- Discovery
- Iguanacolossus was named in 2010 by Andrew McDonald and colleagues. The skeleton was discovered in 2005 by Don DeBlieux in the Cedar Mountain Formation of Utah.1
- Still debated
- Scientists are not sure exactly how old the lower Yellow Cat Member rocks are, so the age of Iguanacolossus is still debated.1
Where the facts come from
- New Basal Iguanodonts from the Cedar Mountain Formation of Utah and the Evolution of Thumb-Spiked Dinosaurs | PLOS One (journals.plos.org)
- PBDB Taxon (paleobiodb.org)
- Iguanacolossus - Wikipedia (en.wikipedia.org)
- Iguanacolossus (en.m.wikipedia.org)
- Iguanacolossus in The Paleobiology Database (CC BY 4.0): age, places, rock formations, classification.
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