Coscinodiscus wailesii Gran et Angst 1931

A = Valve face; B = Girdle; C= Marginal zone of valve with two rows of labiate processes; D = Valve face with scattered labiate processes; E = Central area; F&G = Marginal zone of valve with row of labiate processes. (BF).

Picture of details (SEM)


Life-form: Solitary

Size: Diameter = 230-370 µm (50 - 550 µm in cultures according to Schmid (1990))

Resting spore: -


Distinctive features: A flat disc and mostly with a hyaline central area, wide interstriae. Two rings of labiate processes near valve margin and scattered labiate processes on valve face

Similar species:

Distribution: Widely in temperate waters

Cupp, E. E. 1943. Marine Plankton Diatoms of the West Coast of North America. Bulletin of the Scripps Inst. Oceanogr. of the University of California. 5: 1-237.

Hasle, G. R. & Lange, C. B. 1992. Morphology and distribution of Coscinodiscus species from the Oslofjord, Norway, and the Skagerrak, North Atlantic. Diatom Research. 7: 37-68.

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.

Schmid, A.-M. 1990. Intraclonal variation in the valve structure of Coscinodiscus wailesii Gran et Angst. Nova Hedwigia, Beiheft. 100: 101-119.

Schmid, A.-M. & Volcani, B.E. 1983. Wall morphogenesis in Coscinodiscus wailesii Gran and Angst. I. Valve morphology and development of its architure. Journal of Phycology. 19: 387-402.

  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