Fottea 7(1): 1-31, 2007 | DOI: 10.5507/fot.2007.001

Planktic morphospecies of the cyanobacterial genus Anabaena = subg. Dolichospermum - 1. part: coiled types.

Jiří Komárek1,3, Eliška Zapomělová2,3
1 Institute of Botany, Academy of Science of the Czech Republic, Dukelská 135, CZ-37982 Třeboň, Czech Republic
2 Institute of Hydrobiology, Academy of Science of the Czech Republic, Na sádkách 7, CZ-37005 České Budějovice, Czech Republic
3 Faculty of Biological Science, University of South Bohemia, Branišovská 31, CZ-37005 České Budějovice, Czech Republic

The traditional cyanobacterial genus Anabaena contains several groups of morphospecies, which should be classified in different genera according to modern phenotypic and molecular criteria. The separation into several clusters was confirmed by 16S rRNA sequencing. The generic name Anabaena must be maintained for the benthic species without gas vesicles, the type species of which is Anabaena oscillarioides. The planktic types are divided also in several subclusters; one of them can be provisionally designated as subg. Dolichospermum THW. ex WITTR. et NORDST. 1889 with the type species Anabaena flos-aquae [LYNGB.] BRÉB. ex BORN. et FLAH. 1888. The taxonomy of this cluster, which contains types with coiled as well as straight filaments, is not yet satisfactory solved. The interspecific features are particularly problematic. However, the review of stable coiled morphotypes from the subg. Dolichospermum which aree known and repeatedly occur in natural populations, is presented in this article. This review should help to the orientation of phenotype diversity of coiled Dolichospermum-types, especially in populations occurring in natural habitats.

Keywords: Cyanobacteria, Anabaena, Dolichospermum, taxonomy, identification,morphology, variability, morphospecies, phytoplankton, coiled trichomes

Received: January 10, 2007; Accepted: February 27, 2007; Published: March 1, 2007Show citation

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Komárek, J., & Zapomělová, E. (2007). Planktic morphospecies of the cyanobacterial genus Anabaena = subg. Dolichospermum - 1. part: coiled types. Fottea7(1), 1-31. doi: 10.5507/fot.2007.001
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