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Lemmermanniella

Generic name: LEMMERMANNIELLA Geitler, 1942. In Engler et Prantl, Nat. Pflanzenfam., ed. 2, 1b: 62.
Synonyms: LEMMERMANNIA Elenkin, 1933. Acta Inst. Bot. Acad. Sci. USSR, 2, 1: 26.
Diagnosis:
Type species: Lemmermanniella pallida (Lemmermann) Geitler 1942.
Descriptions:
Komárek & Anagnostidis (1998): Colonies microscopic, in form of mucilaginous spheres, simple or compound, with several spherical subcolonies, sometimes slightly irregular oval, free floating in plankton or metaphyton, consisting of fine, homogeneous, colourless mucilage; beneath the surface is a layer of irregularly, more or less tangentially arranged cells, sometimes overlapped by a thin, but distinctly delimited layer of colonial slime. Cells oval or rod-shaped, up to several times longer than wide, usually slightly distant one from another or in small clusters, pale blue-green, without aerotopes. Without stalks in the colonial center.
Komárek (1992): Unicellular - colonial; colonies microscopic, spherical, irregularly spherical up to irregular, mucilaginous, free living (mainly floating) in freshwater reservoirs, with cells situated more or less in the peripheral layer, without any mucilaginous stalks. Cells are oval to rod-like, without aerotopes, placed in the surface layer tangentially and irregularly or in small groups, sometimes more or less parallely. Mucilage is colourless, fine, limited or diffluent, sometimes slightly concentrically lamellated.
Genotype differences, molecular data:
Reproduction strategies, life cycles, cell division:
Komárek & Anagnostidis (1998): Cell division by transverse binary fission into two equal parts, perpendicular to the longer cell-axis, in one plane in successive generations. Cells become more or less the original size before the next division. They soon separate from one another after division and usually shift to the parallel position; rarely remaining in short rows. Reproduction by «budding» of daughter spherical colonies from the surface of the old mother colony, or by disintegration of colonies into small clusters of cells or even solitary cells.
Komárek (1992): Cell division always perpendicularly to the lengthwise axis of elongated cells, in one and the same plane in successive generations; however, the daughter cells soon shift from the original direction and form groups with parallely situated cells. Colonies reproduce by the "budding" of small daughter colonies, or by disintegration of colonies into small groups of cells enveloped by slime, up into solitary cells.
Ultrastructure:
Taxonomic position, higher hierarchy:
Cyanophyceae, Chroococcales, Synechococcaceae, Aphanothecoideae
Notes to taxonomy, misinterpretations:
Ecology, ecophysiology, ecological significance:
Komárek (1992): The type species occurs rarely planktic in slightly eutrophized lakes in western Baltic region (southern Norway and Sweden, Denmark, northern Germany); two other species were described from small reservoirs with water plants in eastern Slovakia (Czechoslovakia), however, their generic position is not indisputable.
Physiology and biochemistry:
Distribution, endemism, problematic citations:
Reference strain:
Infrageneric scheme, species concept:
List of species:
Lemmermanniella flexa Hindák 1985
Lemmermanniella obesa Azevedo et al. 1999
Lemmermanniella pallida(Lemmermann) Geitler 1942
Lemmermanniella parva Hindák 1985
Lemmermanniella uliginosa Komárek et Komárková-Legnerová 2007. Nova Hedwigia 84(1-2): 102
Keys:
List of stains:
Drawings:
Komárek 1992
Application technology:
Literature:

  2.1 taxonomy: Elenkin 1933, Geitler 1942, Hindák 1985, Komárková & Cronberg 1985, Komárek 1992, Komárek & Anagnostidis 1998, Komárek & Komárková-Legnerová 2007
  2.2 cytomorphology:
  2.3 16S rRNA sequencing:
  2.4 biology and life cycles:
  2.5 ecology: