Peloroplites
Peloroplites was a huge, slow-moving plant-eater covered in bony armor and long spikes. It lived in what is now Utah during the Late Cretaceous Period, about 98 to 93 million years ago.12
When did it live?
How big was it?
How long was it?
How tall was it?
at the hips
How heavy was it?
How big was Peloroplites compared to YOU?
Just maths in your browser. Nothing is saved or sent anywhere.
How fast was it?
Fun facts
Peloroplites is one of the largest known nodosaurids, a group of armored dinosaurs.1
Its body was covered in bony armor plates and long spikes that protected it from big predators like Acrocanthosaurus.2
The name Peloroplites means 'monstrous heavy one' in Greek, referring to its huge size and heavy armor.1
Only one species is known: Peloroplites cedrimontanus, named after the Cedar Mountain Formation where it was found.1
Its skeleton was put together from bones dug up by staff and volunteers from the USU Prehistoric Museum.2
Utah has more species of armored dinosaurs than any other U.S. state, and Peloroplites is one of them.2
Peloroplites lived in a wet, swampy environment near the edge of the Western Interior Seaway.1

Most asked questions about Peloroplites
?How big was Peloroplites?
Peloroplites was about 6 metres (20 feet) long and weighed around 2 tonnes (4,410 lbs). That makes it one of the largest known nodosaurids.12
?What did Peloroplites eat?
Peloroplites was a plant-eater. It had small teeth and a wide beak at the front of its mouth to crop low vegetation.23
?When did Peloroplites live?
Peloroplites lived during the Late Cretaceous Period, about 98 to 93 million years ago.1
?Where was Peloroplites found?
Peloroplites was discovered in the Cedar Mountain Formation in Emery County, Utah, USA.12
?Was Peloroplites a dinosaur?
Yes, Peloroplites was a dinosaur. It belongs to a group of armored dinosaurs called nodosaurids.1

Ask Rex about Peloroplites
Rex only answers questions about this page. 10 questions a month.
Rex is an AI and can make mistakes. He runs on servers in the EU and questions are never saved. Never type your name or other personal things.
For dino experts
- Scientific name
- Peloroplites
- Named by
- Carpenter et al. 20084
- Group
- Armoured dinos
- Family / clade
- Nodosauridae4
- Classification
- Ornithischia > Ankylosauria > Nodosauridae > Thyreophora4
- Age of the rocks
- 121 to 100 million years (Aptian / Albian)4
- Rock formations
- Cedar Mountain4
- Countries
- USA4
- Fossil records
- 1 in the Paleobiology Database4
- Discovery
- Peloroplites was named in 2008 by Kenneth Carpenter and colleagues from a partial skull and other bones found in the Price River II quarry in Utah.1
- Still debated
- Scientists are not sure exactly how large Peloroplites grew, because different estimates give lengths from 5 to 6 metres.1
Where the facts come from
- Peloroplites (en.wikipedia.org)
- Armored Monster Invades USU Eastern Prehistoric Museum (usu.edu)
- Peloroplites cedrimontanus (eastern.usu.edu)
- Peloroplites in The Paleobiology Database (CC BY 4.0): age, places, rock formations, classification.
Every fact on this page has a number that points to its source. If we got something wrong, sorry, we are dino fans, not a science journal. Tell us at [email protected] and we will fix it.
Rex is hungry! Dino Wiki is a dad's project for his dino-loving son, free with no ads. Grown-ups can feed Rex a snack to help keep it online.Feed Rex