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Name derivation: |
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“Hollow Sphere” (From the Greek koilos -hollow, and sphaira, dim. sphairion –ball, sphere) |
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Classification: |
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Coelosphaerium Nägeli 1849; 15 of 25 species descriptions are currently accepted taxonomically (Guiry and Guiry 2013).Order Chroococcales; Family Gomphosphaeriaceae |
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Morphology: |
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Spherical to oval colonies of cells held in a single outer layer of the mucilage. Usually colorless or black in the presence of gas vesicles. |
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Similar genera: |
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Microcystis, with which it often occurs, also produces gas vesicles that gives it the same black color; however Coelosphaerium colonies are made of a single layer of cells, while Microcystis colonies are not hollow. |
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Habitat: |
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Freshwater plankton worldwide |
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References: |
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Nägeli, C. 1849). Gattungen einzelliger Algen, physiologisch und systematisch bearbeitet. Neue Denkschriften der Allg. Schweizerischen Gesellschaft für die Gesammten Naturwissenschaften 10(7): i-viii, 1-139, pls I-VIII. Graham L. E. and L. W. Wilcox. 2000. Algae. Prentice Hall Guiry, M.D. and G.M. Guiry 2013. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 04 September 2013. Jaeger E. C. 1972. A source-book of biological names and terms. 3rd Ed. Charles C. Thomas Publisher Wehr J.D. and R. G. Sheath. 2003. Freshwater Algae of |
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