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Lithococcus

Generic name: LITHOCOCCUS Ercegović, 1925. Acta Bot. Inst. Bot. Zagreb. 1: 83.
Synonyms:
Diagnosis:
Type species: Lithococcus ramosus Ercegović 1925. - Monotypic genus.
Descriptions:
Komárek & Anagnostidis (1998): Colonies endolithic, irregularly reticulate, composed of randomly divaricate and anastomozing,
more or less limited and firm mucilaginous, filamentous strands, colourless, homogeneous, inside with uniseriate, irregular rows of cells, oriented parallel
to the strands; in places with widened mucilage, the cells are irregularly distributed; without special envelopes around them. Cells spherical, ellipsoidal
or oval, near to one another after division.

Komárek (1992): Unicellular - colonial; colonies endolithic, filamentous, irregularly net-like, composed from thin, mucilaginous strings, in which the cells are arranged in irregular rows with cells clearly distant one from another; old parts of strings are widened with irregularly disposed cells. Mucilaginous strings homogeneous, without any structures, special envelopes around solitary cells are missing. Cells spherical, ellipsoidal or oval.
Geitler (1932): Lager endolithisch, fadenförmig, wiederholt „verzweigt". Zellen meist ellipsoidisch, seltener kugelig, in dicken Lagerteilen regellos, in dünnen parallel zur Längsachse der „Fäden" gestellt, in den jüngsten Teilen in einer Reihe. Keine Spezialhüllen: Zellen in homogener, kaum sichtbarer Gallerte.

Genotype differences, molecular
data:
Reproduction strategies, life cycles, cell division:
Komárek & Anagnostidis (1998): Cell division by binary fission, probably only in one plane in successive generations, perpendicular to the length of the strands. Reproduction possibly by liberation of solitary cells. Insufficiently known monospecific genus.
Komárek (1992): Cell division probably only in one plane, more or less perpendicular to the axis of strings. Reproduction not described, probably by liberated solitary cells or small clusters of cells in mucilaginous envelopes.
Ultrastructure:
Taxonomic position, higher hierarchy:
Cyanophyceae, Chroococcales, Synechococcaceae, Aphanothecoideae
Notes to taxonomy, misinterpretations:
Ecology, ecophysiology, ecological significance:
Komárek (1992): The single species L. ramosus was described as endolithic, subaerophytic cyanophyte from localities in calcareous rocky areas in Croatia (Yugoslavia) and not yet revised or proved from other regions.
Physiology and biochemistry:
Distribution, endemism, problematic citations:
Reference strain:
Infrageneric scheme, species concept:
List of species:
Lithococcus ramosus Ercegović 1925
Keys:
List of stains:
Drawings:
Komárek 1992
Application technology:
Literature:

  2.1 taxonomy: Ercegović 1925, Geitler 1932, Geitler 1942, Bourrelly 1977, Komárek 1992, Komárek & Anagnostidis
1998
  2.2 cytomorphology:
  2.3 16S rRNA sequencing:
  2.4 biology and life cycles:
  2.5 ecology: