Pterosperma marginatum Gaarder 1954

Cell at different focal planes. (arrow=pore) (DIC)


Life-form: Solitary

Size: Diameter=15 µm (excl. lists)

Resting spore:


Distinctive features: Protruding alae encircling a pore in the wall

Similar species: Pterosperma cristatum Pterosperma polygonum

Distribution: Atlantic

Gaarder, K. R. 1954b. Coccolithineae, Silicoflagellatae, Pterospermataceae and other forms from the "Michael Sars" North Atlantic deep-sea expedition 1910. Rep. Sci. Res."Michael Sars" N. Atlant. Deep-sea Exp. 1910, II: 1-20.

Parke, M., Boalch, G. T., Jowett, R. & Harbour, D. S. 1978. The genus Pterosperma (Prasinophyceae): Species with a single equatorial ala. J. Mar. Biol. Ass. U.K. 58: 239-276.

Throndsen, J. 1993. The planktonic marine flagellates. In: (Tomas eds.) Marine Phytoplankton: a guide to naked flagellates and coccolithophorids. Academic Press, San Diego, pp. 7-145.

  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