Acanthoceras (ammonite)

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Acanthoceras
Temporal range: Albian-Coniacian
~109.0–89.3  Ma
Acanthoceratidae - Acanthoceras rhotomagensis.JPG
Fossil of A. rhotomagensis from France, on display at Galerie de paléontologie et d'anatomie comparée in Paris
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Ammonoidea
Order: Ammonitida
Family: Acanthoceratidae
Subfamily: Acanthoceratinae
Genus: Acanthoceras
Neumayr, 1875
Species

See text

Acanthoceras is an extinct cephalopod genus belonging to the subclass Ammonoidea and family Acanthoceratidae that lived from the Albian to early Coniacian stages of the Cretaceous. [1]

Contents

Description

Their shells had ornate ribs whose function is unknown, although some scientists have speculated that these ribs helped strengthen the animals' shells to allow them to live at greater depths where the water pressure is higher. An adult had a shell diameter of approximately 100 centimetres (39 in).

Species

Distribution

Acanthoceras fossils have been found in Australia, Brazil, Bulgaria, Colombia (Hondita Formation, Prado, Tolima), [2] Denmark, Egypt, Marocco, France, Germany, India (Gujarat)

    , Iran, Madagascar, Mexico, Mozambique, Nigeria, Papua New Guinea, Peru, the United Kingdom, United States (California, Minnesota, New Mexico, Texas), and Venezuela. [1]

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    References

    1. 1 2 Acanthoceras at Fossilworks.org
    2. Patarroyo, 2011

    Bibliography

    Further reading