Gymnodinium mikimotoi Miyake et Kominami ex Oda 1935

A = Ventral view with apical groove (=arrow); B = Dorsal view, chloroplasts with pyrenoids; C = Ventral view, ellipsoidal nucleus (DIC)

Synonym(s): Gymnodinium nagasakiense Takayama et Adachi 1985

Life-form: Solitary

Size: Length 18-37 µm, width 14-35 µm.

Resting spore:

Note: Toxic and a red-tide causing organism. Often referred to Gyrodinium aureolum in european waters

Distinctive features: The cells flattened dorso-ventrally, nucleus ellipsoidal and on the left side, chloroplasts with pyrenoids

Similar species: Gyrodinium aureolum

Distribution: Worldwide

Partensky, F., Vaulot, D. Couté, A. & Sournia, A. 1988. Morphological and nuclear analysis of the bloom-forming dinoflagellates Gyrodinium cf. aureolum and Gymnodinium nagasakiense. J. Phycol. 24: 408-415.

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.

Takayama, H. 1990. Dinoflagellates. In "Red tide organisms in Japan-An illustrated taxonomic guide". (Y. Fukuyo, H. Takano, M. Chihara & K. Matsuoka eds)Uchida Rokakuho, Tokyo. P. 48-49

Takayama, H. Matsuoka, K. & Fukuyo, Y. 1998. A taxonomic study on Gyrodinium aureolum Hulburt (Dinophyceae) from the morphological viewpoint based on materials collected in Japanese coastal waters. Bull. Plankton Soc. Japan. 45: 9-19.

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Last modified on 15 September, 2006

Swedish Meteorological and Hydrological Institute

Department of Marine Ecology, Göteborg University, Sweden