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Cartoon of Tanaisosaurus
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Tanaisosaurus

Other sea reptilesEarly Triassic to Middle TriassicNot technically a dinosaur

Tanaisosaurus belongs to the group: Other sea reptiles. Its fossils come from rocks about 251 to 247 million years old.1

Fun fact: this sea reptile swam while dinosaurs walked on land. Everyone calls them dinos, but they were a different branch of reptiles.
Lived
251 to 247 million years ago1
Early Triassic to Middle Triassic
Most fossils found in
Russia1

When did it live?

Triassic
Jurassic
Cretaceous
252 million years ago20114566, the asteroid
AI-madeAI-made picture of Tanaisosaurus
An AI-made picture of how Tanaisosaurus 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.

For dino experts

Scientific name
Tanaisosaurus
Named by
Sennikov 20011
Group
Other sea reptiles
Family / clade
Cymatosauridae1
Classification
Sauropterygia1
Age of the rocks
251 to 247 million years ()1
Rock formations
Lipovskaya1
Countries
Russia1
Fossil records
1 in the Paleobiology Database1

Where the facts come from

  1. Tanaisosaurus 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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More from the same group: Other sea reptiles

NothosaurusOther sea reptilesPlacodusOther sea reptilesLariosaurusOther sea reptilesCyamodusOther sea reptilesCymatosaurusOther sea reptilesProneusticosaurusOther sea reptiles

Also from the same time: Early Triassic

UtatsusaurusIchthyosaursGrippiaIchthyosaurs
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