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Cyanokybus

Generic name: CYANOKYBUS Schiller, 1956. In Gessner et Vareschi, Ergebn. Deutsch. Limnol. Venezuela-Exped. 1952, p. 202.
Synonyms:
Diagnosis:
Type species:Cyanokybus venezuelae Schiller 1956
Descriptions:
Komárek & Anagnostidis (1998): In colonies; colonies small, few-celled, microscopic, more or less spherical or subspherical, sometimes composed of subcolonies, with cells in short perpendicular rows, more or less distant from one another, sometimes three-dimensionally arranged within colonial slime. Mucilage fine, delimited or diffluent, colourless, forming wide margin around cells. Cells hemispherical, rectangular or cubicroundeii, without or with individual fine envelopes. Monotypic genus.
Komárek (1992): Unicellular - colonial; colonies microscopic (up to 150 um long), sometimes composed from subcolonies, irregularly oval, free living,
with distinct, smooth or slightly diffluent, wide, colourless, mucilaginous envelopes; cells are arranged in rows containing (2)3 up to 9 or more cells in one row, for- ming later usually double-rows in one colony, or up to four parallel rows; the cells are sometimes enveloped by their own mucilaginous envelopes (this phenomenon results in slightly lamellated common mucilage); between the cells are remarkable spaces. Cells irregular, at the end of a row more or less rounded at the outer side, the inner cells rounded-cubic,
more or less isodiametric, slightly flattened from sides; cells with blue-green, +/- homogeneous content or with solitary granules, without aerotopes. The arrangement of cells in rows is the most characteristical feature of this genus within the family Chroococcaceae.
Genotype differences, molecular
data:
Reproduction strategies, life cycles, cell division:
Komárek & Anagnostidis (1998): Cell division changes in three or more planes, later mostly in one plane (origin of short rows); cells later shift within colony and again divide in more planes. Reproduction by disintegration of colonies and by the liberation of solitary cells.
Komárek (1992):Ability of cell division in 3 or more planes, perpendicularly to each other, but the repeated division perpendicularly to one axis of a row prevails in later generations; the cells grow into the original size after their division and before the next binary fission, but
not into the original shape. Reproduction by colony desintegration.
Ultrastructure:
Taxonomic position, higher hierarchy:
Cyanophyceae, Chroococcales, Chroococcaceae
Notes to taxonomy, misinterpretations:Monospecific
genus.
Ecology, ecophysiology, ecological significance:
Komárek (1992):The type and single species, C. venezuelae, grows in metaphyton of periodical pools (salinic/freshwater ?) in old coastal corral areas, overgrown by vegetation, near tropical seas. Till now known only from the Caribbean district (Venezuela, Cuba).
Physiology and biochemistry:
Distribution, endemism, problematic
citations:
Reference strain:
Infrageneric scheme, species concept:
List of species:

Cyanokybus venezuelae Schiller 1956
Keys:
List of stains:
Drawings:
Komárek 1992
Application technology:
Literature:

  2.1 taxonomy: Schiller 1956, Komárek & Anagnostidis 1986, Komárek 1992, Komárek 1994, Komárek & Anagnostidis 1998
  2.2 cytomorphology:
  2.3 16S rRNA sequencing:
  2.4 biology and life cycles:
  2.5 ecology: