Minutocellus polymorphus (Hargraves et Guillard) Hasle, von Stosch et Syvertsen 1983

A = Valve with pili (Dry preparation) (DIC); B = Valve with pili (arrow=ocellulus, arrowhead=groups of small papillae) (SEM)

Valve (SEM)

Synonym(s): Bellerochea polymorpha Hargraves et Guillard 1974

Life-form: Solitary or united in chains

Size: Apical axis 2-30 µm, transapical axis 2-3 µm

Resting spore:

Note: Morphologically a very variable species. It is best studied in TEM

Distinctive features: One valve convex and often with pili with short branches near base, the other valve is concave and lacking pili. Apex bearing an ocellulus

Similar species: M. scriptus

Distribution: Widely

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.

Hasle, G., von Stosch, H.A. & Syvertsen. E.1983. Cymatosiraceae, a new diatom family. Bacillaria. 6: 9-156.

Takano, H. 1990. Diatoms. In "Red tide organisms in Japan-An illustrated taxonomic guide". (Y. Fukuyo, H. Takano, M. Chihara & K. Matsuoka eds.). Uchida Rokakuho, Tokyo, p. 162-331.

  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