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Cyanonephron

Generic name: CYANONEPHRON Hickel, 1985. Algolog. Stud. 38-39: 100.
Synonyms:
Diagnosis:
Type species:Cyanonephron styloides Hickel 1985
Descriptions:
Komárek & Anagnostidis (1998):Colonies free-living, more or less irregularly spherical, globose or ellipsoidal, sometimes composed of subcolonies, with a system of mucilaginous, pseudodichotomously branched and structureless stalks, radiating from the center of colonies (staining!); common gelatinous material surrounding the whole colony not present. Cells more or less elongate, solitary and crosswise at the ends of divaricate stalks, more or less on the colonial periphery, without aerotopes, with parietally (concentrically) localized thylakoids.
Komárek (1992): Unicellular - colonial; colonies microscopic (up to 29 um in diam.), free floating, more or less spherical, oval up to irregular, mucilaginous, with cells distant from one another, arranged more or less in a layer near the surface of the colony, connected by radially, pseudodichotomously branched, hyaline, mucilaginous stalks, radiating from the centre of the colony (staining !); the solitary cells are surrounded by a thin layer of mucilage, but the whole colony is not enveloped by a scarce, hyaline, diffluent slime. Cells elongated, slightly arcuated, with few peripherally and concentrically arranged thylakoids along the cell walls, joined to the stalks by their longer side, pale blue-green, yellowish green or greyish blue-green, without conspicuous inclusions or aerotopes.
Genotype differences, molecular data:
Reproduction strategies, life cycles, cell division:
Komárek & Anagnostidis (1998): Cells divide by binary fission, transversely to their longitudinal axis and perpendicularly to the colonial surface, always in one plane in successive generations. Cells reach the original size before the next division. Reproduction by disintegration of colonies. Monotypic genus.
Komárek (1992):Cell division only in one direction in successive generations, perpendicular to the longer axis of the cell. The colonies disintegrate into small cell groups up to solitary cells
Ultrastructure:
Taxonomic position, higher hierarchy:
Cyanophyceae, Chroococcales, Synechococcaceae, Aphanothecoideae
Notes to taxonomy, misinterpretations:
Ecology, ecophysiology, ecological significance:
Komárek (1992):In fresh or in slightly salinic waters, described from large lakes in Germany (Schleswig-Holstein) and in southern Sweden (Scania) and Finland, usually near the sea shore; probably widely distributed.
Physiology and biochemistry:
Distribution, endemism, problematic citations:
Reference strain:
Infrageneric scheme, species
concept:
List of species:
Cyanonephron elegans Joosten 2006
Cyanonephron styloides Hickel 1985
Keys:
List of stains:
Drawings:
Komárek (1992)
Application technology:
Literature:

  2.1 taxonomy: Hickel 1985,Komárek & Anagnostidis 1986, Komárek 1992, Komárek & Anagnostidis
1998, Joosten 2006
  2.2 cytomorphology:
  2.3 16S rRNA sequencing:
  2.4 biology and life cycles:
  2.5 ecology: