Home

Borzinema

Generic name: BORZINEMA De Toni 1936. Noter. Nomencl. Algol. 8: 2.
Synonyms:
Diagnosis:
Type species: Borzinema rupicola (Borzì) De Toni 1936
Descriptions:
Komárek(1992):Filamentous-thallic; thallus thin, flat, felt-like. Filaments free, tangled, creeping, regularly and Tolypthrix-like false branched, with single branches; older filaments thick, enveloped by a thick, lamellate sheath, younger filaments with thin, homogeneous sheath. Trichomes uniserial, old ones torulous, deeply constricted at cross walls, rarely with true branching, irregularly waved, with more cylindrical young trichomes and young branches, slightly attenuated towards the ends. Cells isodiametric or slightly shorter or longer than wide, without prominent inclusions. Heterocytes develop intercalary, after alse branching remain often at bases of branches, oval or more or less spherical. Old trichomes change often in chroococcoid stages. Akinetes not known.
Genotype differences, molecular data:
Reproduction strategies, life cycles, cell division:
Komárek(1992): Cell division perpendicularly to the trichome axis. Reproduction by solitary cells and by hormogonia, which differentiate
at the ends of branches.
Ultrastructure:
Taxonomic position, higher hierarchy:
Cyanophyceae, Stigonematales, Borzinemataceae
Notes to taxonomy, misinterpretations:
Ecology, ecophysiology, ecological significance:
Komárek(1989): The type species grows subaerophytically on wet rocks and walls near Messina (Italy), but not known enough.
Physiology and biochemistry:
Distribution, endemism, problematic citations:
Reference strain:
Infrageneric scheme, species concept:
List of species:
Borzinema rupicola (Borzì) De Toni 1936
Keys:
List of stains:
Drawings:
click to enlargeKomárek1992
Application technology:
Literature:

  2.1 taxonomy: Borzì 1917, De Toni 1936, Geitler 1942, Bourrelly 1970, Komárek 1992
  2.2 cytomorphology:
  2.3 16S rRNA sequencing:
  2.4 biology and life cycles:
  2.5 ecology: