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Pseudoncobyrsa

Generic name: PSEUDONCOBYRSA Geitler, 1925. Beih. Bot. Centralbl. 41 (2): 237.
Synonyms:
Diagnosis:
Type species: Pseudoncobyrsa lacustris (Kirchner) Geitler 1925. - One species.
Descriptions:
Komárek & Anagnostidis (1998): Colonies ucilaginous, more or less polarized, attached to stony substrates, gelatinous, more or less hemispherical or flattened, (to 2 or more mm high), with cells situated in distinctly «branched», divaricate, radially or vertically oriented rows, enveloped by gelatinous, tubular and confluent sheaths, and, moreover, cells with individual spherical, distinct, delimited or diffluent, non-stratified envelopes (staining !). The whole colony is embedded in homogeneous mucilage with distinct margin. Cells more or less spherical, ellipsoidal or cylindrical with rounded ends, sometimes up to 25 um long.
Komárek (1992): Unicellular - colonial; thallus joined to the stony substrate, gelatinous, more or less hemispherical or flattened (up to 2 mm in diameter), with cells, situated in distinct "branched", radially or vertically oriented rows, enveloped by gelatinous tubular and confluent envelopes and, moreover, by own spherical but not layered envelopes, which are distinct or more or less diffluent. The whole colony is embedded by homogeneous, limited mucilage. Cells large (up to 25 /um long), ellipsoidal
up to shortly cylindrical cells with rounded ends, with slightly granular content.
Geitler (1932): Zellen ellipsoidisch bis zylindrisch, mit nicht ineinander geschachtelten, distinkten oder zerfließenden Spezialhüllen, in gemeinsamer homogener Gallerte liegend, zu deutlichen, mitunter verzweigten Reihen angeordnet, halbkugelige oder flache festsitzende
Lager bildend.
Genotype differences, molecular data:
Reproduction strategies, life cycles, cell division:
Komárek & Anagnostidis (1998): Cell division probably only perpendicularly to the long axis of the radially oriented cells. Reproduction imperfectly described, probably by solitary cells. (Since the cell division proceeds irregularly in more than two planes, the genus belongs to the Entophysalidaceae).
Komárek (1992): Cell division not described, probably predominantly perpendicularly to the longer axis of radially oriented cells, or sometimes irregularly. Reproduction not described.
Ultrastructure:
Taxonomic position, higher hierarchy:
Cyanophyceae, Chroococcales, Synechococcaceae, Synechococcoideae
Notes to taxonomy, misinterpretations:
Ecology, ecophysiology, ecological significance:
Komárek (1992): The type species described from the stony littoral zone of the lake Bodensee (Switzerland/Germany). Very little known and not revised genus, possibly a stage of an bangiacean species (Rhodophyceae).
Physiology and biochemistry:
Distribution, endemism, problematic citations:
Reference strain:
Infrageneric scheme, species concept:
List of species:
Pseudoncobyrsa lacustris (Kirchner) Geitler 1925

Unclear taxa:
Chlorogloea microcystoides sensu Bourrelly 1984

Keys:
List of stains:
Drawings:
Komárek 1992
Application technology:
Literature:

  2.1 taxonomy: Geitler 1925, Skuja 1930,Geitler 1932, Geitler 1942, Komárek 1992,Komárek & Anagnostidis 1998
  2.2 cytomorphology:
  2.3 16S rRNA sequencing:
  2.4 biology and life cycles:
  2.5 ecology: