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Strophomenida
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Strophomenida

brachiopod order

Learn about this topic in these articles:

annotated classification

  • lamp shells
    In lamp shells: Annotated classification

    Order StrophomenidaTeeth deltidiodont when present; ventral muscles large; shell substance pseudopunctate (with rods of calcite), rarely impunctate; more than 400 genera; mid-Ordovician to Early Jurassic.Order PentameridaBiconvex, ventral valve usually with a spondylium (united dental plates); delthyrium usually open; dorsal-valve brachiophores

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