Durotrigensia

Durotrigensia
Temporal range: Bajocian[1]
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Fossil of Durotrigensia species 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:†Parkinsoniidae
Genus:†Durotrigensia
Buckman, 1928
Species

see text

Durotrigensia is a genus of ammonites (Ammonitida) in the perisphinctoid family Parkinsoniidae.

Durotrigensia is sometimes considered a subgenus of Parkinsonia and is related also to Oraniceras and Okribites.

These cephalopods lived during the Bajocian stage of the Middle Jurassic some 170 to 164 million years ago.[1]

Description

These large to giant ammonites have sharp and finely ribbed inner whorls and smooth outer whorls, without tubercles or lappets.

References

  1. 1 2 Sepkoski, Jack (2002). "Sepkoski's Online Genus Database". Retrieved 2014-05-28.
  • Arkell, W.J.; Kummel, B.; Wright, C.W. (1957). Mesozoic Ammonoidea. Treatise on Invertebrate Paleontology, Part L, Mollusca 4. Lawrence, Kansas: Geological Society of America and University of Kansas Press.
  • Ammonites - Parkinsonia (Durotrigensia) sp. entry


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