Descriptor : Structure of inner carcass wall (IW)
Descriptor type : categorical
Inner wall: Internal part of the skeleton, separating central cavity and skeletal structures, composed by a porous carcass, simple or coated by an additional sheath.
Carcass: part of wall on intervallum side.
- Carcass wall well defined
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- Carcass wall not well defined
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Carcass wall not well defined: syn. Rudimentary perforate wall.
- isn't included in the term
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