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Agnosphitys

Say it: ag-noh-SFY-tis

Name means: “unknown begetter”1

Ate: PlantsLong-necksLate Triassic

Agnosphitys was a small, early dinosaur relative that lived during the Late Triassic period, about 208 million years ago. It was a plant-eater and walked on two legs. Scientists are still not sure exactly what kind of animal it was.1 5

Lived

237 to 227 million years ago5

Late Triassic

Fossils found in

Cromhall Quarry, Avon, England1 5

Food

Plants5

Length

0.34 to 0.7 m2 3

largest known specimen

Weight

0.05 kg to 3 kg2 3

largest known specimen

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 25 bananas

as long as 4 bananas end to endabout as heavy as a house catas heavy as 25 bananas

How big was Agnosphitys compared to YOU?

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cool stuff

Fun facts

Agnosphitys means 'unknown begetter' because scientists were not sure what its parents were like.1

Only a few bones of Agnosphitys have been found, including a hip bone, a jaw bone, an arm bone, and an ankle bone.1

Some scientists think Agnosphitys might be a silesaurid, a group of dinosaur-like reptiles that are not true dinosaurs.1

The fossils were discovered in a sinkhole that formed when limestone dissolved long ago.1

Agnosphitys lived during the Late Triassic, about 208 million years ago, when the first dinosaurs were appearing.1

The bones of Agnosphitys were found in the Magnesian Conglomerate of Avon, England.1

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

?How big was Agnosphitys?

It was very small, about 0.7 metres (2.3 feet) long and weighed around 3 kilograms (6.6 pounds).3

?What did Agnosphitys eat?

It was probably an omnivore, eating both plants like ferns and small insects or animals.3 4

?Is Agnosphitys a dinosaur?

Scientists are not sure. It is a dinosauriform, a close relative of dinosaurs, but some studies place it outside Dinosauria.1 3

?Where was Agnosphitys found?

Its fossils were discovered in Avon, England, in a sinkhole that formed when limestone dissolved long ago.1

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For dino experts

Scientific name: Agnosphitys
Named by: Fraser et al. 20025
Group: Long-necks
Family / clade: Guaibasauridae5
Classification: Sauropodomorpha5
Age of the rocks: 237 to 227 million years (Carnian)5
Countries: United Kingdom5
Fossil records: 1 in the Paleobiology Database5
Discovery: Agnosphitys was named by Nicholas Fraser, Kevin Padian, Gordon Walkden, and A. L. M. Davis in 2002. The fossils were found in a quarry in Avon, England.1
Still debated: Scientists are not sure if Agnosphitys is a true dinosaur or a close relative. Some studies place it inside Dinosauria, others outside.1 5

Where the facts come from

Agnosphitys (en.wikipedia.org)
Agnosphitys cromhallensis | Dinosaur Database by DinoAnimals.com (dinoanimals.com)
AGNOSPHITYS - DinoChecker dinosaur archive (dinochecker.com)
Agnosphitys: Overview, Size, Habitat, & Other Facts - Dinosaur Dictionary (dinosaurdictionary.com)
Agnosphitys 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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