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Temporal range: Sinemurian[1]
Ammonite Asteroceras.jpg
Asteroceras fossil from Dorset, England.
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Ammonoidea
Family: Arietitidae
Genus: Asteroceras
Species [2]
  • A. confusum
  • A. obtusum
  • A. smithii
  • A. stellare
  • A. turneri

Asteroceras is an extinct genus of cephalopod belonging to the Ammonite subclass. Asteroceras fossils may be found at Lyme Regis in the Asteroceras obtusum zone of Upper Sinemurian age.[3][2]


  1. ^ Sepkoski, Jack (2002). "Sepkoski's Online Genus Database". Retrieved 2014-05-28. 
  2. ^ a b Paleobiology Database - Asteroceras. 2014-05-29.
  3. ^ Martell, D. M. 1995. An Ichthyosaur with Preserved Soft Tissue from the Sinemurian of Southern England. Palaeontology. 38(4): 897-903