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.Sepkoski, Jack Sepkoski's Online Genus Database – Cephalopoda
Species Klein, J. et al., 2007. FOSSILIUM CATALOGUS I:ANIMALIA Pars 144, Lower Cretaceous Ammonites III Bochianitoidea, Protancyloceratoidea, Ancyloceratoidea, Ptychoceratoidea. Pseudothurmannia angulicostata d'Orbigny, 1863 Pseudothurmannia belimelensis Dimtrova, 1967 ?Pseudothurmannia biassalensis Dimtrova, 1967 Pseudothurmannia catulloi Parona, 1898 ?Pseudothurmannia crimensis Wiedmann, 1962 Pseudothurmannia grandis Busnardo, 1970 Pseudothurmannia isocostata Kakabadze, 1981 Pseudothurmannia karakaschi Manolov, 1962 Pseudothurmannia lurensis Busnardo, 1970 Pseudothurmannia macilenta d'Orbigny, 1841 Pseudothurmannia mortilleti Pictet and de Loriol, 1858 Pseudothurmannia ohmi Winkler, 1868 Pseudothurmannia picteti Sarkar, 1955 Pseudothurmannia provencalis Wiedmann, 1962 Pseudothurmannia pseudomalbosi Sarasin and Schandelmayer, 1901 Pseudothurmannia renevieri Sarasin and Schöndelmayer, 1901 Pseudothurmannia rugosa Busnardo, 2003 Pseudothurmannia 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.
References
External links Hoedemaeker, Philip. J. SEXUAL DIMORPHISM IN THE GENUS PSEUDOTHURMANNIA Crioceratites
Jsdammonites Ammonites