Abstract
Taxonomic diversity of desmids and other coccoid green algae is discussed in relation to different species concepts. For want of unambiguous criteria about species delimitation, no reliable estimations of global species richness can be given. Application of the biological species concept is seriously hampered by lack of sexual reproduction in many species. Molecular analyses demonstrated cases of close affiliation between morphologically highly different taxa and, contrary, examples of little relationship between morphologically similar taxa. Despite the fact that desmids and chlorococcal algae, because of their microbial nature, can be readily distributed, cosmopolitan species are relatively scarce. The geographic distribution of some well-recognizable morphospecies is discussed in detail. Of some species a recent extension of their area could be established, e.g., in the desmids Micrasterias americana and Euastrum germanicum, and in the chlorococcaleans Desmodesmus perforatus and Pediastrum simplex.
Special Issue: Protist diversity and geographic distribution. Guest editor: W. Foissner.
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Coesel, P.F.M., Krienitz, L. (2007). Diversity and geographic distribution of desmids and other coccoid green algae. In: Foissner, W., Hawksworth, D.L. (eds) Protist Diversity and Geographical Distribution. Topics in Biodiversity and Conservation, vol 8. Springer, Dordrecht. https://doi.org/10.1007/978-90-481-2801-3_11
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DOI: https://doi.org/10.1007/978-90-481-2801-3_11
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