Rank Genus Subclass Ammonites | Superfamily Ancylocerataceae | |
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Similar Ammonites, Phyllopachyceras, Pleuroceras solare, Progeronia, Pachyceras | ||
Pseudothurmannia is a genus of extinct cephalopods belonging to the subclass Ammonoidea and included in the family Crioceratitidae of the ammonitid superfamily Ancylocerataceae. These fast-moving nektonic carnivores lived in the Cretaceous period, from Hauterivian age to Barremian age.
Contents
Description
Shell of Pseudothurmannia species can reach a diameter of about 4–12 centimetres (1.6–4.7 in). They show flat or slightly convex sides, a surface with dense ribs and a subquadrate whorl section.
Distribution
Fossils of species within this genus have been found in the Cretaceous rocks of Antarctica, Czechoslovakia, France, Hungary, Italy, Japan, Morocco, Spain, Russia and United States.
References
Pseudothurmannia Wikipedia(Text) CC BY-SA