Chaetoceros constrictus Gran 1897

A = End of chain with part of terminal setae; B = Part of chain; C = Chain with resting spores (arrowhead=spines). All living cells (DIC)

Resting spores


Life-form: Cells united in chains

Size: Diameter = 12-40 µm

Resting spore: +


Distinctive features: Conspicuous constriction between valve mantle and girdle, two chloroplasts, apertures lanceolate, resting spores uniequally vaulted and with spines

Similar species: C. vanheurcki

Distribution: Northern hemisphere

Cupp, E. E. 1943. Marine Plankton Diatoms of the West Coast of North America. Bulletin of the Scripps Inst. Oceanogr. of the University of California. 5: 1-237.

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.

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

Sundström, B. 1973. Chaetoceros arter i Öresund. MSc. Thesis Univ. of Lund. 77 pp.

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Last modified on 15 September, 2006

Swedish Meteorological and Hydrological Institute

Department of Marine Ecology, Göteborg University, Sweden