
The order Ostreida includes the true oysters. One superfamily (Ostreoidea) and two extant families are recognised within it. The two families are Ostreidae, the true oysters, and Gryphaeidae, the foam oysters.
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About 190 million years old, found in the Lias clays and limestones of the Jurassic period. Commonly called Devil's Toenails.
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The order Ostreida includes the true oysters. One superfamily (Ostreoidea) and two extant families are recognised within it. The two families are Ostreidae, the true oysters, and Gryphaeidae, the foam oysters.
==2010 taxonomy== In 2010, a new proposed classification system for the Bivalvia was published by Bieler, Carter & Coan, revising the classification of the Bivalvia, including the order Ostreida.
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).