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Name derivation: |
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Probably from its author De Toni (1894) or from detonsus (L.) = sheared |
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Classification: |
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Detonula F.Schütt ex
De Toni 1894; 3 of 7 species descriptions are currently
accepted taxonomically (Guiry and Guiry 2013) Order Thalassiosirales;
Family Skeletonemataceae Synonym: Detonula pumila =
Schroederella delicatula |
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Morphology: |
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Centric diatom with discoid
or barrel-shaped cells connected in a straight chain by single short mucilage
threads secreted from the center of the valve faces, and by extensions
(flanges) located along the periphery of the valves. Each cell contains several discoid
chloroplasts. |
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Similar genera: |
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Lauderia
has small spines that may be inconspicuous.
Some Detonula species have been transferred to Lauderia. My impression is that either name has been
used to identify individuals because of the overlap. Skeletonema
cells are held together by a ring of multiple silicaceous threads extending
from each valve face and each interlocking midway between cells. |
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Cell division: Influence of temperature, light and salinity: |
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Experiments of clonal cultures of Detonula confervacea from Narragansett Bay, Rhode Island USA grew at temperatures in the range of 2 – 12 C, but not at 16 C, in salinity range of 5-35‰. Optimal light increased with temperature from 200-600 ft-c at 2 C, to 1200-1800 ft-c at 12 C (Smayda 1969). |
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Habitat: |
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Marine coastal zones
(neritic) with preference for warm water. |
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References: |
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De Toni, G.B. (1894).Sylloge
algarum omnium hucusque cognitarum. Vol. II. Sect. III. pp.
819-1556. Patavii [Padua]: Sumptibus
auctoris. Graham
L. and Wilcox L. Algae. Prentice-Hall. (2000) Guiry. M.D. and G.M. Guiry 2013. AlgaeBase. World-wide
electronic publication, National University of Ireland, Galway. http://www.algaebase.org;
searched on 21 Dec 2013. Hasle, G. et al. Identifying Marine Phytoplankton. Academic Press. (1997). Smayda, T. Experimental
observations on the influence of temperature, light, and salinity on cell
division of the marine diatom, Detonula
confervacea (Cleve) Gran. Journal of Phycology 5:150-157. |
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