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Pseudopediastrum
Genus of algae From Wikipedia, the free encyclopedia
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Pseudopediastrum is a genus of green algae in the family Hydrodictyaceae.[2] It is very common in freshwater regions throughout the world.[3]
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Description
Pseudopediastrum forms flat colonies, termed coenobia, of cells in powers of two, usually four, eight, 16, or 32. Coenobia are disc-shaped in outline, and marginal cells are drawn out into two lobes or points. Cells have one chloroplast filling the cell, each with a single pyrenoid.[4] In most species, the cells are contiguous without gaps between them, but this is not always the case. Important identifying characteristics include cell shape and cell wall granulation.[5]
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Taxonomy
In 2005, molecular phylogenetic analyses showed that Pediastrum sensu lato was paraphyletic with respect to Hydrodictyon. Therefore, Pediastrum was split up into several genera, including Pseudopediastrum.[1] However, the genus Pseudopediastrum is still not monophyletic, in particular the morphologically diverse species Pseudopediastrum boryanum. Therefore, the genus is still in need of a revision.[6]
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References
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