Carcass: Part of wall on intervallum side.
Outer wall: External part of the skeleton, composed by a porous carcass, simple or coated by a additional sheath.
Single wall: External part of the skeleton for one-walled cup, composed by a porous carcass, simple or coated by a additional sheath.
Pore: Simple perforation of any skeletal structure. Pore diameter is greater than thickness of the structure.
Canal: Pore modified by skeletal structure thikening or by lintels streching. Canal length is greater than perforation diameter.
Lintel: Skeletal structure separating and bounding adjacent pores/canals.
No porous structure.
Type of carcass perforations: outer wall or single wall (OW/SW) | |_ Shape of carcass perforations openings (OW/SW) {None} | |_ Size of carcass pores (OW/SW) {Canals , None} | |_ Repartition of carcass pores (OW/SW) {Canals , None} | |_ Shape of carcass canals tubes (OW/SW) {Pores , None} | |_ Subdivision of carcass perforations openings (OW/SW) {None} | |_ Direction of carcass canals tubes (OW/SW) {Pores , None} | |_ Origin of carcass canals (OW/SW) {Pores , None} | |_ Rows number of carcass perforations per intersept (OW/SW) {None}