Cyanocystis
| Generic name: CYANOCYSTIS Borzi, 1882. Nuovo Giorn. Bot. Ital. 14: 314. | ||||||||||
| Synonyms: SPHAENOSIPHON Reinsch, 1874/1875. Contr. alg. fung., p. 15. KRKIA Pevalek 1929 DERMOCARPA Crouan p. p. excl. typo (incl. sensu Waterbury & Stanier 1978 p.p.) |
||||||||||
| Diagnosis: | ||||||||||
| Type species: Cyanocystis versicolor Borzi 1882. | ||||||||||
| Descriptions: Komárek & Anagnostidis (1998): Cells solitary or in flattened or hemispherical groups (parallely or radially arranged), attached to the substrate; cells heteropolar, usually slightly or distinctly elongate, widely oval, obovoid, club-shaped or pear-shaped, rarely almost spherical or hemispherical, attached to the substrate more or less perpendicularly by the narrowed end and sometimes by discoidally widened sheath, or by widened base, at the apex rounded; in cultures only irregular groups of cells. Cells in colonies of variable size, with homogeneous, pale blue-green, olive-green or violet content. Sheaths (pseudovaginae) thin, firm, colourless. Komárek (1992): Solitary cells or groups of cells, joined by the basal end to the substrate. Cells more or less polarized, +/- spherical, oval or club-shaped, sometimes narrowed to the basis, attached to the substrate by the small gelatinous pad and by rounded basis; apical end widely rounded. Around cells firm, thin sheaths, later "opened" on the apical end (pseudovaginae). Cell content greyish blue-green, olive green or pinkish red, finely granular, always without aerotopes |
||||||||||
| Genotype differences, molecular data: | ||||||||||
| Reproduction strategies, life cycles, cell division: Komárek & Anagnostidis (1998): Cell division only by rapid successive multiple fission, resulting in numerous, spherical baeocytes, which are liberated from the sheath (pseudovagina) through a rupture at the cell apex; cell division in various planes, but the first plane is always "vertical", from the apex to the base. Baeocytes grow to the mother cell size before the next division (i.e. several times larger than baeocytes). Reproduction only by non-motile baeocytes, which attach to the substrate. Komárek (1992): Reproduction by the rapid successive up to simultaneous total division of cells (multiple fission) into more small daughter cells (nanocytes). The first division proceeds in the cells perpendicularly to the substrate (special type?) or +/- irregulary, further division planes are irregular. Immotile nanocytes escape through the apical or subapical openings in the pseu- dovagina. All cells divide obligatory only once into small nanocytes, which grow after joining to the substrate again into the original size and shape before the next division. Very rarely remains the "basal" nanocyte within the mother pseudovagina |
||||||||||
| Ultrastructure: | ||||||||||
| Taxonomic position, higher hierarchy: Cyanophyceae, Chroococcales, Dermocarpellaceae Notes to taxonomy, misinterpretations:About 16 species |
||||||||||
| Ecology, ecophysiology, ecological significance: Komárek (1992): All species live in aquatic biotopes, attached to different plants. Eight species (inclusive the type species) are freshwater (mountain creeks, not polluted streams, swamps, pools, tropical stagnant streaming waters), occurring mainly on aquatic mosses or on other algae, with different areas of distribution. The marine species occur attached to the littoral higher algae. |
||||||||||
| Physiology and biochemistry: |
||||||||||
| Distribution, endemism, problematic citations: |
||||||||||
| Reference strain: |
||||||||||
| Infrageneric scheme, species concept: |
||||||||||
| List of species: Cyanocystis aquae-dulcis (Reinsch) Kann 1978 Cyanosystis croatica (Pevalek) Komárek et Anagnostidis 1995 Cyanocystis farlowii (Börgesen) Komárek et Anagnostidis 1986 Cyanocystis flahaultii (Sauvageau) Komárek et Anagnostidis 1995 Cyanocystis hemisphaerica (Setchel et Gardner) Kaas 1985 Cyanocystis mexicana Montejano et al. 1993 Cyanocystis minima (Geilter) Komárek et Anagnostidis 1986 Cyanocystis olivacea (Reinsch) Komárek et Anagnostidis 1986 Cyanocystis pacifica (Setchell et Gardner) Komárek et Anagnostidis 1986 Cyanocystis plectonematis (Frémy) Komárek et Anagnostidis 1986 Cyanocystis pseudoxenococcoides (Bourrelly) Bourrelly 1970 Cyanocystis sphaeroidea (Setchell et Gardner) Komárek et Anagnostidis 1986 Cyanocystis tatrensis (Starmach) Komárek et Anagnostidis 1995 Cyanocystis valie-allorgei (Bourrelly) Bourrelly 1970 Cyanocystis versicolor Borzi 1882 Cyanocystis violacea (Crouan) Komárek et Anagnostidis 1986 Cyanocystis xenococcoides (Geitler) Compere 1985 Unclear taxa: |
||||||||||
| Keys: | ||||||||||
| List of stains: | ||||||||||
Drawings: Komárek (1992)
|
||||||||||
| Application technology: | ||||||||||
Literature:
|
Back to list of valid genera