Skeletonema costatum (Greville) Cleve 1873

A = Chain (BF); B = Chain at different focus (DIC); C = Frustules (SEM)

Synonym(s): Melosira costata Greville 1866

Life-form: Cells united in long chains

Size: Diameter = 2 - 21 µm, pervalvaraxis 2-61 µm

Resting spore: ?


Distinctive features: Small cells linked firmly with long external tubes of the marginal strutted processes

Similar species: Skeletonema pseudocostatum

Distribution: Worldwide

Drebes, G. 1974. Marines Phytoplankton, Eine Auswahl der Helgoländer Planktonalgen (Diatomeen, Peridineen). Georg Thieme Verlag, Stuttgart. 186 pp.

Hasle, G. R. 1973b. Morphology and taxonomy of Skeletonema costatum. (Bacillariophyceae). Norw. J. Bot. 20: 109-137.

Hasle, G. R. & Syvertsen, E. E. 1996. Marine diatoms. In: Tomas, C. R. (ed.) Identifying marine diatoms and dinoflagellates. Academic Press, Inc., San Diego, p. 5-385.

Medlin, L. K., Elwood, H. J., Stickel, S. & Sogin, M. L. 1991. Morphological and genetic variation within the diatom Skeletonema costatum (Bacillariophyta): evidence for a new species, Skeletonema pseudocostatum. J. Phycol. 27: 514-524.

  Copyright © 1996-2006, Mats Kuylenstierna & Bengt Karlson All rights reserved.
Last modified on 15 September, 2006

Swedish Meteorological and Hydrological Institute

Department of Marine Ecology, Göteborg University, Sweden