The infraclassis Carinacea includes most living species of regular sea urchin, and fossil forms going back as far as the Triassic.
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The infraclassis Carinacea includes most living species of regular sea urchin, and fossil forms going back as far as the Triassic.
== Taxonomy == List of orders according to World Register of Marine Species: Superorder Calycina Order Phymosomatoida† Superorder Echinacea Order Arbacioida (Gregory, 1900) Order Camarodonta (Jackson, 1912) Order Salenioida Order Stomopneustoida (Kroh & Smith, 2010) Family Glyphopneustidae Smith & Wright, 1993† Family Hemicidaridae Wright, 1857† Family Orthopsidae Duncan, 1889† Family Pseudodiadematidae Pomel, 1883†
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).