Descriptor : Shape of carcass external plates (OW/SW)

Descriptor type : categorical

External plates: Plate covering incompletely one or several perforations of a wall.

Carcass: Part of wall on intervallum side.

OW: Outer wall.

SW: Single wall.

Planar

Arcuate

S-Shaped

S-shaped: Resembles S in longitudinal section.

V-shaped

V-shaped: Resembles V in longitudinal section.

Denticulate

Denticulate: With indented rims.

isn't included in the term

Hierarchy

Carcass external plates: outer wall or single wall (OW/SW)
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 |_ Shape of carcass external plates (OW/SW)