Descriptor : Relationship between rows of carcass pores and tabulae (IW)

Descriptor type : categorical

Pore: Simple perforation of any skeletal structure. Pore diameter is greater than thickness of the structure.

Tabula (plur. tabulae): Transverse porous partition linking both walls of a two-walled cup.

Carcass: Part of wall on intervallum side.

IW: Inner wall.

Stirrup pores

Stirrup: Perforation in front of each tabula.

NB: Transverse section resembles stirrup.

Tabula (plur. tabulae): Transverse porous partition linking both walls of a two-walled cup.

One row of pores between two successive tabulae

Several rows of pores between two successive tabulae

No tabula

isn't included in the term

Hierarchy

Carcass perforations: inner wall (IW)
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 |_ Relationship between rows of carcass pores and tabulae (IW)