Cardioceras is an extinct ammonite genus belonging to the family Cardioceratidae. These fast-moving nektonic carnivores lived during the Jurassic period, Oxfordian age.
Cardioceras is an extinct ammonite genus belonging to the family Cardioceratidae. These fast-moving nektonic carnivores lived during the Jurassic period, Oxfordian age.
==Description== Shells of Cardioceras species can reach a diameter of . The shape is circular, with ribs and a prominent ridge along the dorsal edge.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).