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Brasilonema

Generic name: BRASILONEMA Fiore, Sant'Anna, Azevedo, Komárek, Kaštovský, Sulek et Lorenzi, 2007. J. Phycol. 43:794
Synonyms:
Diagnosis:
Fiore et al. (2003): Cyanobacterium filamentosum, ad substrata praecipue subaerophytica adherens, strata tomentosa formans; filamenta cum vaginis firmis, plus minusve dense irregulariterque fasciculata, isopolares, cylindrica, cum heterocytis solitariis intercalaribus; ramificatio tolypotrichoideum vel scytonematoideum rarissime praesens. Akinetae carentes. Reproductio hormogoniis, apice filamentis liberantibus. Typus generis Brasilonema bromeliae, spec. nova.

Etymology:
Type species: Brasilonema bromeliae Fiore, Sant'Anna, Azevedo, Komárek, Kaštovský, Sulek et Lorenzi 2007.
Descriptions:
Fiore et al. (2007): Filamentous cyanobacterium, attached to solid (mainly subaerophytic) substrates, forming macroscopic, velvet-like strata, sometimes
composed from densely arranged, erect fascicles. Filaments ensheathed, intensely fasciculated, parallel situated, long, 12–26 um wide, cylindrical, of the same width along the whole length; Tolypothrix- or Scytonema-like false branching occurs sporadically, mainly in terminal parts of filaments. Sheaths thin or slightly thickened, sometimes slightly lamellate, colorless or yellow brown, at the ends roundly closed, open after hormogonia release. Trichomes cylindrical, not or very slightly constricted at cross walls, not attenuated toward ends. Cells of different length, very short (up to 1 ⁄ 5 of width) in hormogonia, apical parts of trichomes and in meristematic zones, up to longer than wide in old parts; apical cells morphologically identical with other vegetative cells, rounded at the apex. Heterocytes solitary, intercalary, discoid up to cylindrical, up to longer than wide. Without akinetes
Genotype differences, molecular
data:
Brasilonema Fiore et al. (2007)
Reproduction strategies, life
cycles, cell division:
Fiore et al. (2007): Reproduction by hormogonia: fragmentation of trichomes by necridic cells or without necridic cells, but by formation of special lamellae between divided cells.
Ultrastructure:
Taxonomic position, higher hierarchy:
Ecology, ecophysiology, ecological
significance:
Fiore et al. (2007): In the inner side of leaves of bromeliads and on environmental wooden substrates in a greenhouse of the Botanical Garden in São Paulo, Brazil. [type species]
Physiology and biochemistry:
Distribution, endemism, problematic
citations:
Fiore et al. (2007): greenhouse of the Botanical Garden in São Paulo, Brazil. [type species]
Reference strain:
Fiore et al. (2007): SPC951 (deposited in Bot. Institute, São Paulo, Brazil, and CENA⁄ USP, Piracicaba, Brazil).
Infrageneric scheme, species concept:

List of species:
Brasilonema bromeliae Fiore, Sant'Anna, Azevedo, Komárek, Kaštovský, Sulek et Lorenzi 2007. Journal of Phycology 43: 796
Brasilonema octagenarum Aguiar, Fiore, Franco, Ventrella, Lorenzi, Vanetti et Alfenas 2008. Journal of Phycology 44: 1325
Brasilonema sennae (Komárek 2003)

Unclear taxa:
Brasilonema sp. (Scytonema ocellatum sensu Bruno et al. 2008)
Scytonema gomontii Gutwinski 1901
Scytonema schmidlei De Toni 1936

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

  2.1 taxonomy: Fiore et al. 2007
  2.2 cytomorphology:
  2.3 16S rRNA sequencing:
  2.4 biology and life cycles:
  2.5 ecology: