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Arietites

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Arietites
Temporal range: Early Jurassic, Sinemurian[1]
Arietites bucklandi
Scientific classification
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Arietites

Waagen, 1869
Synonyms

Coroniceras? Arkell, 1947[2]

Arietites bucklandi fossil at the Geological Museum in Copenhagen

Arietites is a genus of massive, giant evolute, psiloceratacean ammonites in the family Arietitidae in which whorls are subquadrate and transversely ribbed and low keels in triplicate, separated by a pair of longitudinal grooves, run along the venter. Fossils are known world wide from the lower Sinemurian stage of the Lower Jurassic. Safari Ltd made an Arietites bucklandi figurine in 2014.

Similar genera include Megarietites in which the keels are reduced and Epammonites in which the ribs are more closely spaced.

Species

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Note: Arietites now only represents a purely morphological term. A revision of the genus is still pending, its representatives are therefore initially classified as Coroniceras (Arietites) under Coroniceras .

References

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  1. ^ Sepkoski, Jack (2002). "Sepkoski's Online Genus Database". Retrieved 28 May 2014.
  2. ^ [ Arietites] at Fossilworks.org

Further reading

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  • Arkell, et al. 1957. Mesozoic Ammonoidea. Treatise on Invertebrate Paleontology. Geological Soc. of America and Univ. of Kansas Press.