Acanthoceras (ammonite)
| Acanthoceras Temporal range: Albian-Coniacian ~109.0–89.3 Ma | |
|---|---|
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| Fossil of A. rhotomagensis 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: | †Acanthoceratidae |
| Subfamily: | †Acanthoceratinae |
| Genus: | †Acanthoceras Neumayr, 1875 |
| Species | |
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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
- Acanthoceras wintoni Adkins 1928
- Acanthoceras athabascense Warren and Stelck 1955
- Acanthoceras chasca Benavides-Caceres 1956
- Acanthoceras compitalis Stoyanow 1949
- Acanthoceras folleatum White 1887
- Acanthoceras joserita Stoyanow 1949
- Acanthoceras jukesbrownei Spath 1926
- Acanthoceras offarcinatum White 1887
- Acanthoceras pollocense Benavides-Caceres 1956
- Acanthoceras rhotomagensis Brongniart 1822
- Acanthoceras sangalense Benavides-Caceres 1956
- Acanthoceras seitzi Riedel 1932
Distribution
Acanthoceras fossils have been found in Australia, Brazil, Bulgaria, Colombia (Hondita Formation, Prado, Tolima),[2] Denmark, Egypt, France, Germany, Iran, Madagascar, Mexico, Mozambique, Nigeria, Papua New Guinea, Peru, the United Kingdom, United States (California, Minnesota, New Mexico, Texas), and Venezuela.[1]
References
- 1 2 Acanthoceras at Fossilworks.org
- ↑ 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). Boletín de Geología, Universidad Nacional de Colombia 33. 69-92. Accessed 2017-03-31.
Further reading
- W.J. Arkell; et al. (1957). R.C. Moore, ed. Mesozoic Ammonoidea, Treatise on Invertebrate Paleontology Part L. Geological Society of America, University of Kansas Press.