Pseudothurmannia


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.

Species

Pseudothurmannia angulicostata d'Orbigny, 1863Pseudothurmannia belimelensis Dimtrova, 1967
  • ?Pseudothurmannia biassalensis Dimtrova, 1967Pseudothurmannia catulloi Parona, 1898
  • ?Pseudothurmannia crimensis Wiedmann, 1962Pseudothurmannia grandis Busnardo, 1970Pseudothurmannia isocostata Kakabadze, 1981Pseudothurmannia karakaschi Manolov, 1962Pseudothurmannia lurensis Busnardo, 1970Pseudothurmannia macilenta d'Orbigny, 1841Pseudothurmannia mortilleti Pictet and de Loriol, 1858Pseudothurmannia ohmi Winkler, 1868Pseudothurmannia picteti Sarkar, 1955Pseudothurmannia provencalis Wiedmann, 1962Pseudothurmannia pseudomalbosi Sarasin and Schandelmayer, 1901Pseudothurmannia renevieri Sarasin and Schöndelmayer, 1901Pseudothurmannia rugosa Busnardo, 2003Pseudothurmannia sarasini Sarkar, 1955

Description

Shell of Pseudothurmannia species can reach a diameter of about. 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, Bulgaria, Czechoslovakia, France, Hungary, Italy, Japan, Morocco, Spain, Russia and United States.