Cell at different focal planes. (arrow=pore) (DIC)
Life-form: Solitary
Size: Diameter=15 µm (excl. lists)
Resting spore:
Note:
Distinctive features: Protruding alae encircling a pore in the wall
Similar species: Pterosperma cristatum Pterosperma polygonum
Distribution: Atlantic
Literature:
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.