Dino card No. 0172 of 2,027

Arrhinoceratops

Say it: ay-RINE-oh-KER-ah-tops

Name means: “no nose-horn face”1 2

Ate: PlantsHorned dinosLate Cretaceous

Arrhinoceratops was a horned dinosaur that lived in Canada near the end of the Age of Dinosaurs. It had a big frill on its head and two long brow horns, but its nose horn was short and blunt. Scientists know it mostly from one skull found in Alberta.1 2

Lived

84 to 66 million years ago4

Late Cretaceous

Fossils found in

Alberta, Canada1 2 4

Food

Plants1

Length

4.5 to 6 m1 2

estimates vary; based on skull size

Weight

1.3 tonnes1

Height

2.5 m3

at the hips

When did it live?

Triassic

Jurassic

Cretaceous

252 million years ago20114566, the asteroid

How big was it?

How long was it?

How tall was it?

at the hips

How heavy was it?

as heavy as 43 big dogs

as long as 6 dogs nose to tailas long as 33 bananas end to endas heavy as 260 watermelonsabout as tall as a door

How big was Arrhinoceratops compared to YOU?

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cool stuff

Fun facts

Arrhinoceratops lived a few million years before its famous relative Triceratops.1

The name 'Arrhinoceratops' means 'no nose-horn face', but scientists later realized it actually did have a nose horn, just a short one.1

Only one complete skull of Arrhinoceratops has been found, so scientists do not know much about the rest of its body.1 2

Its skull had a broad, square frill with two oval openings and a scalloped rear edge.1

The frill of Arrhinoceratops was decorated with about nine bony bumps called osteoderms along the sides.1

Arrhinoceratops lived in a wet coastal environment with warm summers and cool winters, and may have been hunted by the tyrannosaur Albertosaurus.1

The first Arrhinoceratops skull was found by a University of Toronto expedition in 1923 along the Red Deer River in Alberta.1

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

?How big was Arrhinoceratops?

Estimates vary. Some popular science books estimate it was about 6 metres (20 ft) long, while Gregory S. Paul estimated 4.5 metres (15 ft) and 1.3 tonnes (2,900 lb).1 2

?What did Arrhinoceratops eat?

Arrhinoceratops was a herbivore. It likely ate ferns, cycads and conifers, using its sharp beak to bite off leaves or needles.1

?When did Arrhinoceratops live?

It lived during the Late Cretaceous, about 72 to 67 million years ago, a few million years before Triceratops.2 1

?Where was Arrhinoceratops found?

Its remains have been found in Canada, specifically along the Red Deer River in Alberta.1 2

?Did Arrhinoceratops have a nose horn?

Yes, it did have a nose horn, but it was short and blunt. The name 'no nose-horn face' was based on a misunderstanding.1

?Was Arrhinoceratops a dinosaur?

Yes, Arrhinoceratops was a ceratopsian dinosaur, a type of horned, herbivorous dinosaur.1 2

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Myth buster

Myth: Arrhinoceratops had no nose horn at all.

Truth: It actually had a short, blunt nose horn, like many other horned dinosaurs.1

For dino experts

Scientific name: Arrhinoceratops
Named by: Parks 19254
Group: Horned dinos
Family / clade: Ceratopsidae4
Classification: Ornithischia > Ceratopsia > Ceratopsidae4
Age of the rocks: 84 to 66 million years (Campanian / Maastrichtian)4
Rock formations: Horseshoe Canyon4
Countries: Canada4
Fossil records: 3 in the Paleobiology Database4
Discovery: William Arthur Parks named Arrhinoceratops in 1925 based on a skull found in Alberta, Canada, by a University of Toronto expedition in 1923.1 4
Still debated: Scientists are not sure exactly how Arrhinoceratops is related to other horned dinosaurs like Torosaurus and Anchiceratops.1

Where the facts come from

Arrhinoceratops (en.wikipedia.org)
Arrhinoceratops | Natural History Museum (nhm.ac.uk)
Arrhinoceratops | Part of the Ceratopsian Family of Dinosaurs (dinosaurmadness.com)
Arrhinoceratops in The Paleobiology Database (CC BY 4.0): age, places, rock formations, classification.

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