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Voigt discontinuity




An interruption in the stria pattern of a raphid diatom valve. The Voigt discontinuity, if present, occurs on the secondary side of a valve and marks the point of fusion of the sternum during ontogeny. Named for M. Voigt, who first noted it in 1943.

Alternative Term

Voigt fault

fault irregulare


Mann, D.G. (1981). A note on valve formation and homology in the diatom genus Cymbella. Annals of Botany 47: 267-269.

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.