Descriptor : Localisation of carcass bracts (IW)

Descriptor type : categorical

Bract: Plate stems from lintels which incompletely covering a single pore.

Lintel: Skeletal structure separating and bounding adjacent pores.

Carcass: Part of wall on intervallum side.

IW: Inner wall.

Bract arises within each canal

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.

Bract arises on inner wall

Inner wall: Internal part of the skeleton, separating central cavity and skeletal structures, composed by a porous carcass, simple or coated by an additional sheath.

isn't included in the term

Hierarchy

Type of carcass external plates (IW)
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 |_ Localisation of carcass bracts (IW)