Acanthoceras (ammonite)

Acanthoceras
Temporal range: Albian-Coniacian
~109.0–89.3 Ma
Fossil of A. rhotomagensis from France, on display at Galerie de paléontologie et d'anatomie comparée in Paris
Scientific classification Edit this classification
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]

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

  • A. athabascense Warren and Stelck, 1955
  • A. chasca Benavides-Caceres, 1956
  • A. compitalis Stoyanow, 1949
  • A. folleatum White, 1887
  • A. joserita Stoyanow, 1949
  • A. jukesbrownei Spath, 1926
  • A. offarcinatum White, 1887
  • A. pollocense Benavides-Caceres, 1956
  • A. rhotomagensis (Brongniart, 1822)
  • A. sangalense Benavides-Caceres, 1956
  • A. seitzi Riedel, 1932
  • A. wintoni Adkins, 1928

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]

References

  1. ^ a b Acanthoceras at Fossilworks.org
  2. ^ Patarroyo, 2011

Bibliography

  • Patarroyo, Pedro (2011), "Sucesión de Amonitas del Cretácico Superior (Cenomaniano-Coniaciano) de la parte más alta de la Formación Hondita y de la Formación Loma Gorda en la Quebrada Bambucá, Aipe - Huila (Colombia)" (PDF), Boletín de Geología, Universidad Nacional de Colombia, 33: 69–92, retrieved 2017-03-31

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