Biraphid

Diatoms with a raphe on each valve are termed biraphid. Examples of biraphid genera include Amphora, Epithemia, Gomphonema, Navicula and Mastogloia.

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.

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