Cardioceras

Cardioceras is an extinct ammonite genus belonging to the family Cardioceratidae. These fast-moving nektonic carnivores lived during the Jurassic period, Oxfordian age.[2][3]

Cardioceras
Temporal range: Jurassic, [1]
Fossil of Cardioceras persecans from France, on display at Galerie de paléontologie et d'anatomie comparée in Paris
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: †Ammonoidea
Order: †Ammonitida
Family: †Cardioceratidae
Genus: †Cardioceras
Neumayr & Uhlig, 1881

Description

Shells of Cardioceras species can reach a diameter of 20–25 millimetres (0.79–0.98 in).[4] The shape is circular, with ribs and a prominent ridge along the dorsal edge.[5]

Distribution

Fossils of species within this genus have been found in the Jurassic of France, Germany, Poland, Russia, the United Kingdom[1] and Alaska.[6]

References
  1. "Paleobiology Database - Cardioceras". Retrieved 2017-10-19.
  2. Sepkoski, Jack (2002). "A compendium of fossil marine animal genera (Cephalopoda entry)". Bulletins of American Paleontology. 363: 1–560. Archived from the original on 2008-05-07. Retrieved 2017-10-18.
  3. Mikko's Phylogeny Archive
  4. Cardioceras.ru
  5. Encyclopædia Britannica
  6. Ralph W. Imlay (1981). Late Jurassic Ammonites of Alaska


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