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Cumnoria

Say it: kum-NOR-ee-uh

Name means: “from Cumnor, the village where it was found”1 2

Ate: PlantsBeaked plant-eatersLate Jurassic

Cumnoria was a small, plant-eating dinosaur that lived in what is now England during the Late Jurassic. It walked on two legs and had a slender build, like a speedy little lizard with a beak.1 2

Lived

152 to 149 million years ago3

Late Jurassic

Fossils found in

Chawley Brick Pits, Cumnor Hurst, Oxfordshire, England1 3

Food

Plants3 2

Length

3.5 to 5 m1 2

the holotype is a juvenile about 3.5 m long; adults may have reached 5 m

Weight

up to 250 kg2

When did it live?

Triassic

Jurassic

Cretaceous

252 million years ago20114566, the asteroid

How big was it?

How long was it?

How heavy was it?

as heavy as 8 big dogs

as long as 5 dogs nose to tailas long as 28 bananas end to endas heavy as 50 watermelons

How big was Cumnoria compared to YOU?

Just maths in your browser. Nothing is saved or sent anywhere.

cool stuff

Fun facts

Cumnoria was first thrown on a rubbish heap by brick pit workers before a scientist rescued the bones.1 2

It was originally thought to be a species of Iguanodon, then Camptosaurus, before being recognized as its own genus.1 2

Cumnoria may be the oldest known member of a group called Styracosterna, which includes more advanced duck-billed dinosaurs.1

The only known skeleton is a juvenile, because its vertebrae and ribs were not fully fused together.1

Cumnoria had a special ridge on its shoulder bone and an oval muscle scar on its upper arm that are unique among its relatives.1

AI-made picture of Cumnoria — An AI-made picture of how Cumnoria 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 Cumnoria

?How big was Cumnoria?

About 3.5 to 5 metres long. That is roughly the length of a small car.1 2

?What did Cumnoria eat?

It was a plant-eater, or herbivore. It used its beak to bite off leaves and other plants.1 2

?When did Cumnoria live?

It lived during the Late Jurassic period, about 156 to 151 million years ago.1 2

?Where was Cumnoria found?

Its fossils were discovered in a brick pit near Cumnor, Oxfordshire, England.1 2

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Myth buster

Myth: Cumnoria is just a young Camptosaurus.

Truth: Scientists now think Cumnoria is a separate genus, not a baby Camptosaurus, based on unique features in its bones.1 2

For dino experts

Scientific name: Cumnoria
Named by: Seeley 18883
Group: Beaked plant-eaters
Family / clade: Styracosterna3
Classification: Ornithischia > Ornithopoda > Iguanodontia3
Age of the rocks: 152 to 149 million years (Kimmeridgian)3
Rock formations: Kimmeridge Clay3
Countries: United Kingdom3
Fossil records: 1 in the Paleobiology Database3
Discovery: Workers at Chawley Brick Pits in 1879 found the bones on a dump heap. They were given to Professor George Rolleston, then to Joseph Prestwich, who reported it as a new Iguanodon. John Whitaker Hulke named it Iguanodon prestwichii in 1880. Harry Govier Seeley gave it the genus Cumnoria in 1888.1 2
Still debated: Scientists still debate whether Cumnoria is a distinct genus or should be lumped back into Camptosaurus.1 2

Where the facts come from

Cumnoria (en.wikipedia.org)
CUMNORIA : DinoChecker dinosaur archive (dinochecker.com)
Cumnoria 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.

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