Glossary
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Headpole
The headpole is the broader apex, or pole, of a clavate or cuneate valve. Example genera include Didymosphenia, Gomphoneis, Gomphonema and Peronia.
See also footpole.
Image Credit: Pat Kociolek
Image Credit: Pat Kociolek
The headpole is the broad end of the diatom. The footpole is the narrow end.