Descripteur : Structure of inner carcass wall (IW)
Type du descripteur : 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
Carcass wall not well defined
Carcass wall not well defined: syn. Rudimentary perforate wall.