Asteroceras (from Ancient Greek ἀστήρ (astḗr), meaning "star", and κέρας (kéras), meaning "horn") is an extinct genus of cephalopod belonging to the Ammonite subclass. These fast-moving nektonic carnivores lived during the Triassic and Jurassic periods (from 205.6 to 189.6 Ma).
Species Asteroceras blakei Spath, 1925 Asteroceras confusum Spath, 1925 Asteroceras dommerguesi Zaitsev, 2023 Asteroceras obtusum (Sowerby, 1817) Asteroceras reynesi Fucini, 1903 Asteroceras saltriensis Parona, 1896 Asteroceras smithii (Sowerby, 1814) Asteroceras stellare (Sowerby 1815) Asteroceras turneri (Sowerby, 1814) Paleobiology Database - Asteroceras. 2014-05-29.Biolib
Distribution Asteroceras fossils may be found in the Jurassic marine strata of Canada, China, Germany, Hong Kong, Hungary, Peru, and Turkey, in the Triassic of United States and at Lyme Regis in the Asteroceras obtusum zone of Upper Sinemurian age.Martell, D. M. 1995. An Ichthyosaur with Preserved Soft Tissue from the Sinemurian of Southern England. Palaeontology. 38(4): 897–903
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