Lanceolate

Lanceolate refers to a valve having an elongated outline, widest at the middle and tapering to both ends. The valve width may range from wide to narrow.

Citations

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

Lanceolate1 — The valve shape of *Navicula tripunctata* is narrowly lanceolate.

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