title: Pseudothurmannia
text: # 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, 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 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, Bulgaria, Czechoslovakia, France, Hungary, Italy, Japan, Morocco, Spain, Russia and United States.
  
  