Ceratium horridum (Cleve) Gran 1902

Cells in Lugol. (DIC)

Synonym(s): C. tripos var. horridum Cleve 1897 , C. tenue (Ostenfeld et Schmidt) Jørgensen 1911

Life-form: Solitary

Size: Length 280-360 µm, width 40-50 µm .

Resting spore:

Note: A very variable species. According to Reinecke (1973) this species should be named C. tenue

Distinctive features: Open-ended horns and nearly straight apical horn

Similar species: C. longipes

Distribution: Worldwide

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.

Reinecke, P. 1973. Studies on the genus Ceratium Schrank, with reference to specimens collected in the Agulhas current 3. J. S: Afr. Bot., 39 (4): 277-374.

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