Descriptor : Relationship between carcass canals and intersept (OW/SW)
Descriptor type : categorical
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.
Intersept: Part of a wall or intervallum between two adjacent radial vertical structures (septa, taeniae).
OW: Outer wall.
SW: Single wall.
Carcass: Part of wall on intervallum side.
- Stirrup canals
-
Stirrup: Perforation in front of each vertical intervalar structure.
NB: Transverse section resembles stirrup.
Vertical intervallar structures: Longitudinal and often radial structures inside the intervallum (septa, taeniae…).
1 canal at septa level
1 canal at septa level
1 canal at septa level
- Several rows of canals per intersept
-
Intersept: Part of a wall or intervallum between two adjacent radial vertical structures (septa, taeniae…).
Intervallum: Space enclosed between the walls.
Several rows of canals per intersept
- No intervallar vertical elements
-
Hierarchy
Carcass perforations: outer wall or single wall (OW/SW) | |_ Relationship between carcass canals and intersept (OW/SW)