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…).

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.

No intervallar vertical elements

isn't included in the term

Hierarchy

Carcass perforations: outer wall or single wall (OW/SW)
 |
 |_ Relationship between carcass canals and intersept (OW/SW)