''Cardioceras'' is an extinct ammonite genus belonging to the family

Cardioceratidae Cardioceratidae is an extinct ammonite family belonging to the superfamily Stephanoceratoidea. These fast-moving nektonic carnivores lived during the Middle-Late Jurassic The Late Jurassic is the third epoch of the Jurassic Period, and it sp ...

. These fast-moving nektonic carnivores lived during the

Jurassic The Jurassic ( ) is a geologic period and stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately Mya. The Jurassic constitutes the middle period of ...

period, Oxfordian age.

Description

Shells of ''Cardioceras'' species can reach a diameter of . The shape is circular, with ribs and a prominent ridge along the dorsal edge.

Distribution

Fossils of species within this genus have been found in the

of France, Germany, Poland, Russia, the United Kingdom and Alaska.Ralph W. Imlay (1981). Late Jurassic Ammonites of Alaska
/ref>

References

Jurassic ammonites Ammonites of Europe Ammonitida genera Stephanoceratoidea {{ammonitina-stub