The footpole is the narrower apex, or pole, of a clavate valve. It often contains an apical porefield. Example genera include Didymosphenia, Gomphoneis and Gomphonema.

See also headpole.

Alternative Terms

base pole

This alternative is used in Round (1990).

G Olivaceum Footpole
Image Credit: Pat Kociolek
The footpole of Gomphoneis olivaceum.