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)
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
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.