Descriptor : Cup shapes
Descriptor type : categorical
Cup: Calcareous archaeocyathan skeleton.
- Cylindrical-conical
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Cylindrical: Conical cup nearly cylinder.
Conical: Cup in form of inverted cone.
- Subspherical
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Subspherical: Cup nearly spherical.
- Domal
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Domal: Cup in vault.
- Discoid
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Discoid: Flat.
- isn't included in the term
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