Outline: a typical sauropod
Cardiodon
"heart tooth"
Type species Cardiodon rugulosus
- Lived
- 168 to 165 million years ago, Middle Jurassic
- Diet
- Herbivore
- Group
- Sauropods
- Found in
- United Kingdom
- Named by
- Owen 1841
Where its fossils were found
The evidence
Today
165 million years ago
Field notes
About Cardiodon
What it was like
Cardiodon is known only from sauropod teeth shaped like a heart in cross section. It was a long-necked plant eater.
Its world
It lived in the Middle Jurassic, in what is now England. It comes from the Forest Marble Formation, where Megalosaurus and the sauropod Cetiosaurus have also been found.
How it was found
Owen named Cardiodon in 1841, making it one of the first sauropods ever named. The type species is Cardiodon rugulosus.
Lived alongside
Found in the same rock formations
Close relatives
Other members of Eusauropoda
Sources: WikidataNamed in: R. Owen. 1841. Odontography; or, a Treatise on the Comparative Anatomy of the Teeth; Their Physiological Relations, Mode of Development, and Microscopic Structure, in the Vertebrate Animals. Part II. Dental System of Reptiles

