Friday, 6 December 2019


Pseudothurmannia picteti, Photo: Manuel Peña Nieto 
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 the Hauterivian to the Barremian.

Shells of Pseudothurmannia 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.

We find fossils of Pseudothurmannia in Cretaceous outcrops in Antarctica, Czechoslovakia, France, Hungary, Italy, Japan, Morocco, Spain, Russia and the United States. The specimen you see here is in the collection of Manuel Peña Nieto from Córdoba, Spain and is from the Lower Cretaceous of Mallorca.