Dictyocha speculum Ehrenberg 1839

A = A living cell; B = Skeleton with seven spines (A=DIC, B=BF)

Skeleton (SEM)

Synonym(s): Distephanus speculum (Ehrenberg) Haeckel 1887

Life-form: Solitary flagellate

Size: 19-34 µm (including spines)

Resting spore:

Note: Naked stages and life history (see Henriksen et al.1993)

Distinctive features: Skeleton-bearing stage usually with hexagonal skeleton. Naked stage. Both stages with many chloroplasts

Similar species:

Distribution: Widely in cold and temperate waters

Boney, A. D.1973. Observations on the silicoflagellate Dictyocha speculum Ehrenb. from the Firth of Clyde. J. Mar. Biol. Ass. U.K. 53: 263-268.

Henriksen, P., Knipschildt, F., Moestrup, Ø. & Thomsen, H. A. 1993. Autecology, life history and toxicology of the silicoflagellate Dictyocha speculum (Silicoflagellata, Dictyochophyceae). Phycologia. 32: 29-39.

Throndsen, J. 1993. The planktonic marine flagellates. In: Marine Phytoplankton: a guide to naked flagellates and coccolithophorids/edited by Carmelo R. Tomas: 7-145.

Gemeinhardt, K.1930. Silicoflagellatae. Schiller, J. Coccolithineae. Rabenhorst's Kryptogamen-Flora., 10: 1-85

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Last modified on 15 September, 2006

Swedish Meteorological and Hydrological Institute


Department of Marine Ecology, Göteborg University, Sweden