Lauderia annulata Cleve 1873

A-F = Cells in chains; G = Cleaned valve with processes and one labiate process (=arrow). A,B,D-F (BF), C&G (PC)

Cells with chloroplasts (DIC)

Synonym(s): Lauderia borealis Gran 1900

Life-form: Cells united in long chains

Size: Diameter = 20-75 µm, pervalvar axis 26-96 µm

Resting spore:


Distinctive features: A large marginal labiate process. Many processes on valve face and margin

Similar species: Bacteriosira bathyomphala, Detonula pumila

Distribution: Tropical to temperate seas

Cleve, P. 1873b. Examination of diatoms found on the surface of the Sea of Java. Bih. Kongl. Svensk. Vet.-Akad. Handl. 1(13): 1-13.

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.

Drebes, G. 1974. Marines Phytoplankton, Eine Auswahl der Helgoländer Planktonalgen (Diatomeen, Peridineen). Georg Thieme Verlag, Stuttgart. 186 pp.

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.

Syvertsen, E. E. & Hasle, G.R. 1982. The marine planktonic diatom Lauderia annulata Cleve, with particular reference to the processes. Bacillaria. 5: 243-256.

  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