Pachydesmoceras

Pachydesmoceras is a genus of ammonites belonging to the family Desmoceratidae.

Pachydesmoceras Temporal range: Cretaceous
Pachydesmoceras sp., upper Cretaceous (Turonian), from Madagascar
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	†Ammonoidea
Order:	†Ammonitida
Family:	†Desmoceratidae
Subfamily:	†Puzosiinae
Genus:	†Pachydesmoceras Spath, 1922

Species of this genus were fast-moving nektonic carnivorous shelled cephalopods. They lived during the Cretaceous, from the Albian (112.0-99.6 Mya) to the Santonian (85.8-83.5 Mya) stage.

Distribution

Cretaceous of Antarctica, Cameroon, India, Japan, Nigeria, Romania, United States (California).

• 
  Fossil of Pachydesmoceras pachydiscoide from Japan. Exhibit in the National Museum of Nature and Science, Tokyo, Japan.

See also

• Cephalopod size