From Frustule
| Areola, Areolae |
- Regular perforations in the valve wall, typically covered by a velum, often marked by more or less elaborate multi-angular walls or ribs (Hasle & Syvertsen, 1996)
- Regularly repeated perforations through the basal siliceous layer occluded by a velum. There are three basic components: the chamber or passage through the siliceous layer, the velum, and the foramen. Areolae of this basic structure are of two types (poroid and locular).
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References
- Hasle, G.R. & Syvertsen, E.E., 1996. Marine Diatoms. In C.R. Tomas (ed), Identifying Marine Diatoms and Dinoflagellates. Academic Press, Inc., California. pp. 5-385.
- Nikolaev, V. 1993. The "pore" apparatus of centric diatoms: a description of terms. Nova Hedwigia, Beiheft 106. p. 33-42.
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External Links
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