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Clavate

Cingulum

 

Colliculate

Having the shape of a club. Usually applied to describe the asymmetry of Gomphoneis and Gomphonema in valve view.


Citations

Barber, H.G. and Haworth, E.Y. (1981). Guide to the Morphology of the Diatom Frustule. Freshwater Biological Association, 112 pp.