Durotrigensia

Durotrigensia
Temporal range: Bajocian[1]
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.
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