Alexandrium ostenfeldii (Paulsen) Balech et Tangen 1985

A = Cell with foodvacuole; B = Apical pore complex; C&D = 1'-plate with ventral pore(=arrow). A-C DIC, D=Cell stained with calcofluor white, UV-excitation

Synonym(s): Gonoidoma ostenfeldii Paulsen 1904 , Gonyaulax ostenfeldii (Paulsen) Paulsen 1949 Gonyaulax globosa (Braarud) Balech 1971

Life-form: Solitary

Size: Length 39-57 µm, width 43-54 µm.

Resting spore: +

Note: Toxic

Distinctive features: Characteristic 1'-plate and large ventral pore

Similar species: A. peruvianum Fragilidium spp

Distribution: Widely

Balech, E. & Tangen, K. 1985. Morphology and taxonomy of toxic species in the Tamarensis group (Dinophyceae): Alexandrium excavatum (Braarud) comb. nov. and Alexandrium ostenfeldii (Paulsen) comb. nov. Sarsia., 70: 333-343.

Hansen, G. & Larsen, J. 1992. Dinoflagellater i danske farvande. In: Thomsen, H. A. (ed.) Plankton i de indre danske farvande. Havforskning fra Miljøstyrelsen, Copenhagen, p. 45-155.

Larsen, J. & Moestrup, Ø. 1989. Guide to toxic and potentially toxic marine algae. The Fish Inspection Service, Ministry of Fisheries, Copenhagen. p. 61

Østergaard, M. J. & Moestrup, Ø. 1997. Autecology of the toxic dinoflagellate Alexandrium ostenfeldii: life history and growth at different temperatures and salinities. Eur. J. Phycol. 32: 9-18.

Steidinger, K. A. & Tangen, K. 1996. Dinoflagellates. In: Tomas, C. R. (ed.) Identifying marine diatoms and dinoflagellates. Academic Press, Inc., San Diego, p. 387-584.

  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