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Peloroplites

Say it: pel-oh-ro-PLY-teez
Name means: “monstrous heavy one”1
Ate: PlantsArmoured dinosEarly Cretaceous

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

Lived
121 to 100 million years ago4
Early Cretaceous
Fossils found in
Cedar Mountain Formation, Emery County, Utah, USA41
Food
Plants12
Length
5 to 6 m1
estimates vary; Carpenter et al. 2008 gave 5 to 5.5 m, Paul 2016 gave 6 m
Weight
2 tonnes to 4.5 tonnes12
Height
1.98 m2
at the hips
Top speed
about 13 km/h (8 mph)
Running, estimate

When did it live?

Triassic
Jurassic
Cretaceous
252 million years ago20114566, the asteroid

How big was it?

How long was it?

Peloroplites about 6 m longA bicycle about 1.8 mA car about 4.5 mAn elephant, the biggest land animal today about 6.5 mA house about 10 m

How tall was it?

A dogabout 0.6 mPeloroplitesabout 1.98 m tall🚪A doorabout 2 mA house with 2 floorsabout 7 m

at the hips

How heavy was it?

as heavy as 3 cars
as long as 6 dogs nose to tailas long as 33 bananas end to endabout as heavy as an elephantas heavy as 900 watermelonsabout as tall as a door

How big was Peloroplites compared to YOU?

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How fast was it?

cool stuff

Fun facts

1

Peloroplites is one of the largest known nodosaurids, a group of armored dinosaurs.1

2

Its body was covered in bony armor plates and long spikes that protected it from big predators like Acrocanthosaurus.2

3

The name Peloroplites means 'monstrous heavy one' in Greek, referring to its huge size and heavy armor.1

4

Only one species is known: Peloroplites cedrimontanus, named after the Cedar Mountain Formation where it was found.1

5

Its skeleton was put together from bones dug up by staff and volunteers from the USU Prehistoric Museum.2

6

Utah has more species of armored dinosaurs than any other U.S. state, and Peloroplites is one of them.2

7

Peloroplites lived in a wet, swampy environment near the edge of the Western Interior Seaway.1

AI-madeAI-made picture of Peloroplites
An AI-made picture of how Peloroplites might have looked, made by a computer from what scientists know. It is a guess: the real animal may have looked different, and nobody knows its true colours.
you asked

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

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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

  1. Peloroplites (en.wikipedia.org)
  2. Armored Monster Invades USU Eastern Prehistoric Museum (usu.edu)
  3. Peloroplites cedrimontanus (eastern.usu.edu)
  4. Peloroplites in The Paleobiology Database (CC BY 4.0): age, places, rock formations, classification.

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