Mastigocladus

Generic name: MASTIGOCLADUS Cohn ex Kirchner 1898. In Engler et Prantl, Nat. Pflanzenfam. 1(1a): 81.
Synonyms:
Diagnosis:
Type species: Mastigocladus laminosus Cohn ex Kirchner 1898
Descriptions:
Komárek (1992): Thallous; thallus in a form of soft, spongy mats, sometimes with small lime crystalls, smooth or gelatinous at the surface, up to compact, ocasionally layered, dirty blue-green or olive green, composed from more or less densely tangled filaments. Trichomes uniserial, irregularly coiled, with thin, distinct, colourless sheaths, which diffluent in old stages; true branching of T- or reverse Y- type, often unilateral, in some stages the branching is rare or almost absent; branches usually continually tapering to the ends. False branching also facultatively present, but not common. Heterocytes intercalar, solitary or (rarely) in pairs. Akinetes very rare, solitary in old parts of trichomes.
Genotype differences, molecular data:
Reproduction strategies, life cycles, cell division:
Komárek (1992): Cells divide crosswise or lengthwise before branching. Reproduction by hormogonia or by disintegration of trichomes.
Ultrastructure:
Taxonomic position, higher hierarchy:
Cyanophyceae, Stigonematales, Mastigocladaceae, Mastigocladoideae
Notes to taxonomy, misinterpretations:
Ecology, ecophysiology, ecological significance:
Komárek (1992): The type species, M. laminosus, is typical obligatory thermophilic species and occurs in thermal springs throughout the world (including Antarctica). However, it is very probably dependent on a special set of environmental conditions (temp. 45-60°C, pH >7.5, aerobic, low salinity), and all other records, particularly from cold water belong evidently to other species. Also the very wide variability, ascribed to M. laminosus, concern probably in some cases a mixture of genotypic different
procaryotes. Other species must be revised.
Physiology and biochemistry:
Distribution, endemism, problematic citations:
Reference strain:
Infrageneric scheme, species concept:

List of species:

Mastigocladus laminosus
Cohn ex Kirchner 1898

Unclear taxa:
Mastihocladus hansgirgii Schmidle 1900
Mastigocladus laminosus var. phormidioides (Boye-Petersen) Copeland 1936
Mastigocladus laminosis f. anabaenoides (Boye-Petersen) Copeland 1936
Mastigocladus laminosus f. microchaetoides Frémy sensu Bourrelly et Manguin 1952
Mastigocladus laminosus f. nostocoides Frémy 1936

Keys:
List of stains:
Drawvings:
Komárek 1992
Application technology:
Literature:
  2.1 taxonomy: Geitler 1932, Geitler 1942, Anagnostidis 1961, Komárek 1992
  2.2 cytomorphology:
  2.3 16S rRNA sequencing:
  2.4 biology and life cycles:
  2.5 ecology: