Generic name: CHONDROCYSTIS Lemmermann, 1899. Abh. Naturwiss. Ver. Bremen 16: 353.

Synonyms:

Diagnosis:

Type species: Chondrocystis schauinslandii Lemmermann, 1899. - Three not revised species.

Descriptions:
Komárek & Anagnostidis (1998): Colonies free-living, more or less irregular or irregular-polygonal in outline, packet-like, gelatinous, laterally usually flattened or (in masses) slimy granular, later macroscopic, metaphytic or covering the substrate with a mucilaginous layer up to several cm thick, composed of numerous partial sub colonies, sometimes with precipitates (calcium carbonate particles). Subcolonies (small partial groups) surrounded by more or less cubic or polygonal flattened, widened, colourless, delimited slime, cells with individual thin, gelatinous, slightly stratified envelopes, usually following the spherical cell outline. Envelopes are partially thickened.
Komárek (1992): Unicellular - colonial; colonies irregular, gelatinous, from above more or less flat or slimy granular, macroscopic, covering the substrate in a layer up to 35 cm (?) thick, composed from partial subcolonies, fine, in lower parts with calcium carbonate precipitations. Cells with their own gelatinous, slightly layered envelopes, joined to small partial groups with wide slime, which are gathered within the common colony and form mucilaginous cell groups, flattened from all sides (irregularly polygonal subcolonies). Envelopes are partially thickened. Cells spherical

Genotype differences, molecular data:

Reproduction strategies, life cycles, cell division:
Komárek & Anagnostidis (1998): Cell division not described, probably in 3 (more ?) planes in succeeding generations. Reproduction by small subcolonies after colony disintegration.
Komárek (1992):Cell division not described, probably in more planes in succeeding generations. Reproduction by small subcolonies.

Ultrastructure:

Taxonomic position, higher hierarchy:
Cyanophyceae, Chroococcales, Microcystaceae
Notes to taxonomy, misinterpretations:One from very unsufficiently known genus, which needs revision, probably synonymous to CHLOROGLOEA Wille.

Ecology, ecophysiology, ecological significance:
Komárek (1992):Two species described from oceanic coastal lagoons (Hawaii-Laysan, Bermuda Islands).

Physiology and biochemistry:

Distribution, endemism, problematic
citations:

Reference strain:

Infrageneric scheme, species concept:

List of species:

Chondrocystis bracei Howe 1924
Chondrocystis dermochroa (Nägeli) Komárek et Anagnostidis 1995
Chondrocystis sarcinoides (Elenkin) Komárek et Anagnostidis 1995
Chondrocystis schauinslandii Lemmermann 1899

Unclear taxa:
Chroococcus rechingerii  Wille 1914

Keys:

List of stains:

Drawings:
Komárek 1992

Application technology:

Literature:

 
2.1 taxonomy: Geitler 1942, Kondrateva & al. 1984 (sub Chlorogloea sarcinoides), Komárek 1992, Komárek & Anagnostidis 1995, Komárek & Anagnostidis 1998

 
2.2 cytomorphology:

 
2.3 16S rRNA sequencing:

 
2.4 biology and life cycles:

 
2.5 ecology:

Back to list of valid genera