Dino card No. 1715 of 2,027

Sthenarosaurus

Say it: sthen-AR-oh-SORE-us

Name means: “strong lizard”2

Ate: MeatPlesiosaursEarly JurassicNot technically a dinosaur

Sthenarosaurus was a plesiosaur, a long-necked marine reptile that swam in the Jurassic seas. It was a strong hunter that ate fish and other sea creatures. Its fossils were found in England.2

Fun fact: this sea reptile swam while dinosaurs walked on land. Everyone calls them dinos, but they were a different branch of reptiles.

Lived

184 to 175 million years ago2

Early Jurassic

Fossils found in

United Kingdom (England)2

Food

Meat2

Length

up to 3 m1

estimate

When did it live?

Triassic

Jurassic

Cretaceous

252 million years ago20114566, the asteroid

How big was it?

How long was it?

as long as 3 dogs nose to tailas long as 17 bananas end to end

How big was Sthenarosaurus compared to YOU?

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cool stuff

Fun facts

Sthenarosaurus lived during the Early Jurassic period, about 184 to 174 million years ago.2

It is known from only two fossil collections, both found in England.2

The name Sthenarosaurus means 'strong lizard' in Greek.2

Sthenarosaurus was a plesiosaur, a group of marine reptiles that were not dinosaurs.2

Its fossils were found in the Alum Shale formation, which was once a shallow sea.2

AI-made picture of Sthenarosaurus — An AI-made picture of how Sthenarosaurus 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.

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For dino experts

Scientific name: Sthenarosaurus
Named by: Watson 19092
Group: Plesiosaurs
Family / clade: Plesiosauroidea2
Classification: Plesiosauria > Sauropterygia2
Age of the rocks: 184 to 175 million years (Toarcian)2
Rock formations: Alum Shale2
Countries: United Kingdom2
Fossil records: 2 in the Paleobiology Database2
Discovery: Sthenarosaurus was named by D. M. S. Watson in 1909 based on fossils from England.2
Still debated: Scientists are not sure exactly how big Sthenarosaurus was, because only a few bones have been found.2

Where the facts come from

Sthenarosaurus (en.wikipedia.org)
Sthenarosaurus 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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