Foramen

Foot pole

 

Frustule

The large opening in one wall of a loculate areola. Located on the external or internal wall of the areola, depending on species, opposite the velum. Plural form is foramina.


Citations

Round, F.E., Crawford, R.M. and Mann, D.G. (1990). The Diatoms. Biology and Morphology of the Genera. Cambridge University Press, Cambridge, 747 pp.