Echioceras is an extinct genus of ammonites from the Early Jurassic of Europe and North America.
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Echioceras is an extinct genus of ammonites from the Early Jurassic of Europe and North America.
==Description== Shell of Echioceras species can reach a diameter of about .. The narrow and broad evolute shell is reinforced by fine ribs on inner whorls, progressively becoming stronger, straight and distinct.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).