Coscinodiscus radiatus Ehrenberg 1841

A&B = Cell at two focal planes (BF); C&D = Valve at different interference contrast (DIC)

Valve in inside view (SEM)


Life-form: Solitary

Size: Diameter = 30-180 µm

Resting spore:


Distinctive features: Flat cells with large uniform areolae in radial rows throughout the entire valve face

Similar species: Coscinodiscus argus, C. marginatus

Distribution: Worldwide

Hasle, G. & Sims, P. A. 1986a. The diatom genus Coscinodiscus Ehrenb.: C. argus Ehrenb. and C. radiatus Ehrenb. Botanica Marina. 29: 305-318.

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.

Hendey, N. I. 1964. An introductory account of the smaller algae of British coastal waters. Part 5: Bacillariophyceae (Diatoms). HSMO, London. 317 pp.

  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