Cyano Database - Db of genera -Radiocystis
|Generic name: RADIOCYSTIS Skuja, Symb. Bot. Uppsala 9(3): 43.|
|Type species: Radiocystis geminata Skuja 1948.|
Komárek & Anagnostidis (1998): Colonies free floating, more or less spherical to irregular, microscopic, with fine, colourless, diffluent gelatinous envelopes, with cells more or less irregularly grouped in the colonial center and radiating in all directions in more or less uniseriate rows; cells in radial rows slightly distant from one another or (after division) in pairs, widely oval or almost spherical, facultatively with aerotopes.
Komárek (1992): Unicellular - colonial; colonies more or less spherical or slightly irregularly oval, microscopic, up to 100 μm in diameter, free-living, enveloped by very fine, colourless and diffluent gelatinous mucilage, with more or less radially oriented cells in short, variable rows, which are usually slightly disordered; cells separated slightly one from another, sometimes in pairs (after division). In the centre of colony and in old colonies are sometimes the rows of cells not clearly distinct. Cells spherical up to widely oval (particularly before division), with pale blue-green content, sometimes with scarcely occurring aerotopes.
|Genotype differences, molecular data:|
|Reproduction strategies, life cycles, cell division:
Komárek & Anagnostidis (1998): Cells divide transversely in one plane in successive generations, in later stages perpendicularly
to the radiating rows. Reproduction by disintegration of mucilaginous colonies.
Komárek (1992): Cells divide crosswise in one plane in consequent generations and the daughter cells remain after division often longer time near one to another. Reproduction by the disintegration of colonies.
|Taxonomic position, higher hierarchy:
Cyanophyceae, Chroococcales, Synechococcaceae, Aphanothecoideae
Notes to taxonomy, misinterpretations:
|Ecology, ecophysiology, ecological significance:
Komárek (1992): The type species occurs commonly in plankton of the nordic lakes in the Europe, northern Japan and North America, where occurs in the typical form. This species is published often also from other regions, especially of the temperate zone, but also from tropical countries. The genotypic identity of such populations with the type species should be proved.
|Physiology and biochemistry:
|Distribution, endemism, problematic citations:
|Infrageneric scheme, species concept:
|List of species:
Radiocystis aphanothecoidea Hindák 1996
Radiocystis elongata Hindák 1996
Radiocystic fernandoi Komárek et Komárková-Legnerová 1993
Radiocystis geminata Skuja 1948
Radiocystis magadze Komárek et Cronberg 1999
|List of stains:|