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Epigloeosphaera

Generic name: EPIGLOEOSPHAERA Komárková-Legnerová, 1991. Algolog. Stud. 62: 10-11.
Synonyms:
Diagnosis:
Type species:Epigloeosphaera glebulenta (Zalessky)Komárková-Legnerová 1991
Descriptions:
Komárek (2003): Colonies are microscopic to (rarely, when old) macroscopic, composed of clusters of irregular mucilaginous spheres or elongated formations, with smooth surfaces, on which scarce and irregularly situated solitary cells are observed (from above). Mucilage is firm, homogeneous, colorless, and distinctly
delimited. Cells are widely oval to cylindrical, up to 4.2 μm long, distant (after division in pairs), with no obvious gas vesicles, and pale blue-green. Cell division is only in one plane in successive generations, perpendicular to the longer cell axis.
Komárek & Anagnostidis (1998): Colonies mucilaginous, more or less spherical, oval or elongate, microscopic, solitary, in pairs or compound, forming irregular groups where colonies of different size are tightly grouped together, free floating in the plankton, metaphyton, or living in sapropel; cells distributed irregularly and distant from each other on the surface of the primary colonial mucilage (hyaline gelatinous spheres or cylinders), without their own gelatinous envelopes. Mucilage of
primary colonies homogeneous, delimited, smooth on the surface. Cells oval or rod-shaped, small, short, without aerotopes or prominent granules.
Komárek (1992): Unicellular - colonial; colonies microscopic in a form of slightly irregular mucilaginous spheres, on the surface of which are scarcely, irregularly distributed elongated cells; gelatinous spheres composed usually into irregular agglomerations. Mucilage homogeneous, not structured, colourless, limited with more or less firm margin. Cells oval or rod-like, more or less distant one from another, without aerotopes, pale blue-green or greyish.
Genotype differences, molecular data:
Reproduction strategies, life cycles, cell division:
Komárek & Anagnostidis (1998): Cell division by transverse binary fission into two equal daughter cells, perpendicularly to the long axis. Reproduction by the disintegration of compound and single colonies, even into unicellular fragments.
Komárek (1992): Division of cells only perpendicular to their longer axis; daughter cells separate soon one from another. Reproduction by the disintegration of colonies in mucilaginous clusters with several or solitary cells
Ultrastructure:
Taxonomic position, higher hierarchy: Cyanophyceae, Chroococcales, Synechococcaceae, Aphanothecoideae
Notes to taxonomy, misinterpretations:Monotypic
genus.
Ecology, ecophysiology, ecological significance:
Komárek (2003): Populations typically develop in benthic habitats (epipelic, among plants) in oligotrophic and mesotrophic pools, ponds, and lakes;
sometimes they float in metaphyton or in plankton.
Komárek (1992):The single species known from plankton, tychoplankton and epipelon of mesotrophic lakes. Known only from Scandinavia (Sweden, Finland),from the NW Soviet Union (Karelia, vicinity of St. Peterburg) and from central Canada.
Physiology and biochemistry:
Distribution, endemism, problematic citations:
Reference strain:
Infrageneric scheme, species concept:
List of species:
Epigloeosphaera brasilica Azevedo et al. 2003
Epigloeosphaera glebulenta(Zalessky)Komárková-Legnerová 1991
Epigloeosphaera filamentosa Komárek et Cronberg 1998
Keys:
List of stains:
Drawings:
Komárek 1992
Application technology:
Literature:

  2.1 taxonomy: Zalessky 1925 (subAphanothece), Komárková-Legnerová 1991, Komárek 1992, Komárek
& Anagnostidis 1998, Komárek & Cronberg 1998, Komárek 2003
  2.2 cytomorphology:
  2.3 16S rRNA sequencing:
  2.4 biology and life cycles:
  2.5 ecology: