Descriptor : Relationship between carcass canals zone A and intersept (IW)
Descriptor type : categorical
Zone A: Intervallum side.
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…).
Carcass: Part of wall on intervallum side.
IW: Inner wall.
- Stirrup canals
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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
Stirrup canals
- 1 canal spanning several intersept
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1 canal spanning several intersept
- 1 row of canals per intersept
-
1 row of canals per intersept
- Several rows of canals per intersept
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Several rows of canals per intersept
Hierarchy
Carcass perforations: inner wall (IW) | |_ Relationship between carcass canals zone A and intersept (IW)