Guinardia delicatula (Cleve) Hasle 1996

A = Living cells (BF); B&C = Living cells (DIC) ; D = Two chloroplasts with pyrenoids (DIC). Arrowhead=external process, arrow=external depression

Synonym(s): Rhizosolenia delicatula Cleve 1900

Life-form: Solitary or united in chains

Size: Diameter = 9 - 22(49) µm, Pervalvar axis 27-110 µm

Resting spore:


Distinctive features: Flat valve with thin process and cell with 2-8 large chloroplasts each with a large pyrenoid

Similar species:

Distribution: Widely

Cleve, P. 1900. The plankton of the North Sea, the English Channel, and the Skagerak in 1898. Kongl. Svensk. Vet.-Akad. Handl. 32(8): 1-53.

Drebes, G. 1974. Marines Phytoplankton, Eine Auswahl der Helgoländer Planktonalgen (Diatomeen, Peridineen). Georg Thieme Verlag, Stuttgart. 186 pp.

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.

Sundström, B. G. 1986. The marine genus Rhizosolenia. Doctoral Dissertation, Lund University, Lund, Sweden. 117 pp.

  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