Kingdom Animalia Phylum Mollusca Rank Species | Family Arietitidae Genus Asteroceras Subclass Ammonites | |
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Similar Asteroceras, Ammonites, Promicroceras, Arnioceras, Echioceras | ||
Asteroceras obtusym, the Obtuse Star Ammonite, is an extinct species of cephalopod belonging to the Ammonite subclass and to the family Arietitidae. These fast-moving nektonic carnivores lived during the lower Jurassic period, upper Sinemurian, around 189-196 million years ago
Contents
Description
Asteroceras obtusym has a shell reaching a diameter of about 8–20 centimetres (3.1–7.9 in).
Distribution
Fossils of this species may be found in Mexico, Russia, France, Germany (Aalen) and United Kingdom, at Lyme Regis in the Asteroceras obtusum zone of Upper Sinemurian age
References
Asteroceras obtusum Wikipedia(Text) CC BY-SA