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Kutorginida

fossil order of lamp shells

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classification

  • lamp shells
    In lamp shells: Annotated classification

    Order KutorginidaCalcareous, biconvex interarea (smooth surface in area between beak and hinge line) present; delthyrium (opening in the pedicle) closed by a plate, the pseudodeltidium; dorsal valve with interarea; muscle area narrow and elongated in both valves; 3 genera; Early to mid-Cambrian.Order OrthidaUsually…

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