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Name: Asteroceras stellare
Age: Lower Lias, Jurassic
Location: Lyme Regis, Dorset, United Kingdom
Asteroceras stellare, the true 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, around 196.5 to 189.6 million years ago.