Additional sheath: Second part of a wall composed by two zones (carcass + sheath).
OW: Outer wall.
SW: Single wall.
Microporous sheath: Thin skeletal plate supported by carcass and pierced by micropores (lesser diameter than pores).
Mesh: Network composed by a layer of vertical elements linked or not by horizontal skeletal element.
Sieve: Aditional sheath stemmed from pores subdivisions.
Subdivided pore: Pores irregularly divided by radial protrusions of lintels.
Protrusion: Rod divided pores.
Lintel: Skeletal structure separating and bounding adjacent pores.
Additional sheath | |_ Type of additional sheath (OW/SW) | |_ Type of microporous sheath (OW/SW) {Mesh , Sieve formed by protrusions} | |_ Repartition of bracts on additional sheath (OW/SW) {Mesh} | |_ Type of mesh (OW/SW) {Microporous sheath , Sieve formed by protrusions} | |_ Type of shieve (OW/SW) {Microporous sheath , Mesh} | |_ Repartition of micropores (OW/SW) {Mesh}