Magnipterygius is an extinct genus of primitive ichthyosaur found in the Early Jurassic (Lower Toarcian) Posidonia Shale of Dotternhausen, Germany. The holotype specimen is SMNS96922, a nearly complete articulated skeleton. This genus is well known as a small-sized ichthyosaur, of around length, making it the second genus of that size after the Triassic. Due to the similarities with the genus Stenopterygius it has been classified as a member of the family Stenopterygiidae.
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).