Chaetoceros didymus Ehrenberg 1845

Chain with resting spores, (arrow=valve protrusion) (BF)

Chain with siliceous hairs (SEM)


Life-form: Cells united in chains

Size: Diameter=10-40 µm

Resting spore: +

Note: Complex of taxa (Rines & Hargraves 1988)

Distinctive features: Valve protuberance, setae, siliceous hairs, resting spores in pairs

Similar species: C. protuberans


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.

Jensen, K. G. & Moestrup, Ø. 1998. The genus Chaetoceros (Bacillariophyceae) in inner Danish coastal waters. Opera Botanica. 133: 1-68.

Rines, J. E. B. & Hargraves, P. E. 1988. The Chaetoceros Ehrenberg (Bacillariophyceae) flora of Narragansett Bay, Rhode Island, USA. Bibliotheca Phycologica 79: 1-196

  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