Dino card No. 0685 of 2,027

Galeamopus

Say it: gal-ee-ah-MO-pus

Name means: “helmet need”1

Ate: PlantsLong-necksLate Jurassic to Early Cretaceous

Galeamopus was a huge, long-necked plant-eater that lived during the Late Jurassic. It had a whip-like tail and a small head, and it munched on ferns and other plants.1

Lived

155 to 143 million years ago5

Late Jurassic to Early Cretaceous

Fossils found in

Wyoming and Colorado, USA1 5

Food

Plants1

Length

12 to 14 m2

estimate for the related Kaatedocus, but Galeamopus was similar in size

When did it live?

Triassic

Jurassic

Cretaceous

252 million years ago20114566, the asteroid

How big was it?

as long as 3 cars parked in a rowas long as 78 bananas end to end

How big was Galeamopus compared to YOU?

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

cool stuff

Fun facts

Galeamopus was named in 2015, but its fossils were first found in 1884.1

The name Galeamopus means 'helmet need', a joke about the brittle braincase of the type specimen.1

Galeamopus had a unique skull with a curved paroccipital process on the back of the head.1

It had thirteen unique features that set it apart from other diplodocid dinosaurs.1

The first Galeamopus skeleton was found by William H. Utterback in 1902 near Sheridan, Wyoming.1

One Galeamopus specimen, nicknamed 'Max', was discovered in 1995 at the Howe-Stephens Quarry.1

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

?How big was Galeamopus?

Scientists have not published a specific length or weight for Galeamopus, but as a diplodocid sauropod it was probably similar in size to other diplodocids, which could reach about 25 metres (82 feet) long.1

?When did Galeamopus live?

Galeamopus lived during the Late Jurassic, about 155 to 152 million years ago.1 3

?What did Galeamopus eat?

Galeamopus was a herbivore that ate plants like ferns, as mentioned in the page intro.1

?Where was Galeamopus found?

Galeamopus fossils have been found in Wyoming and Colorado in the United States.1 4

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For dino experts

Scientific name: Galeamopus
Named by: Tschopp et al. 20155
Group: Long-necks
Family / clade: Diplodocidae5
Classification: Sauropodomorpha > Sauropoda > Diplodocoidea5
Age of the rocks: 155 to 143 million years (Kimmeridgian / Tithonian)5
Rock formations: Morrison5
Countries: USA5
Fossil records: 6 in the Paleobiology Database5
Discovery: The first fossils of Galeamopus were collected in 1884 by Marshall P. Felch in Colorado, but the genus was named in 2015 by Emanuel Tschopp, Octávio Mateus, and Roger Benson.1
Still debated: Scientists are still debating whether some Galeamopus specimens belong to a separate species or are just variations of the same species.1

Where the facts come from

Galeamopus (en.wikipedia.org)
ncbi.nlm.nih.gov (ncbi.nlm.nih.gov)
Paleo Profile: The "Need Helmet" Dinosaur | Scientific American (scientificamerican.com)
PeerJ Osteology of Galeamopus pabsti sp. nov. (Sauropoda: Diplodocidae), with implications for neurocentral closure timing, and the cervico-dorsal transition in diplodocids (peerj.com)
Galeamopus 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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