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Geminocystis

Generic name: GEMINOCYSTIS Korelusová, Kaštovský et Komárek 2009. Journal of Phycolology 45:933.
Synonyms:
Diagnosis:
Korelusová et al. (2009):
Cellulae cyanoprocaryoticae, solitariae, sphaericae vel paucim ovales, post divisionem hemisphaericae et mox binae (quattuor) coniunctae, nunquam in coloniis, 3-10 um in diametro, sine mucilagine, vel cum involucris tenuis, diffluentibus, incoloris, circum cellulis solitariis. Cellulae aeruginosae, griseo-virides vel subroseae. Contentu cellularum homogeneo, sine separatio in centro- et chromatoplasma, interdum, cum stiis longitudinalibus (positio thylakoidarum). Systema thylokoidarum in cellulis longitudine plus minusve paralleliter vel irregulariter ordinata. Divisio cellularum in partes duas similares in planos duas in generationes subsequentis; cellulae filiales, aequales, hemisphaericae, crescentes in status originali subgloboso ante proxima divisione. Cellulae semper in cellulis duobus filialis dividuntur in planes perpendiculares in generaciones subseqventes.

Etymology:
Type species: Geminocystis herdmanii Korelusová, Kaštovský et Komárek 2009
Descriptions:
Korelusová et al. (2009): Cells cyanoprokaryotic, solitary, spherical or slightly oval, after division hemispherical and for a short time two (four) together, never forming colonies, 3-10 um in diameter, without mucilage or (mainly) with narrow, fine, colorless, and usually diffluent and indistinct mucilaginous envelopes. Cell content homogeneous, without separation of centroand chromatoplasma, sometimes with lengthwise striation (thylakoids situated in cells lengthwise). Color of cells is pale blue-green, bright-green, grey, or pinkish.
Genotype differences, molecular
data:
Reproduction strategies, life
cycles, cell division:
Korelusová et al. (2009): pinkish. Cell division by binary fission (mainly byp inching) into two morphologically equal, hemispherical daughter cells, which reach the original globular shape before next division; cells always divide into two perpendicular planes in successive generations.
Ultrastructure:
Taxonomic position, higher hierarchy:
Ecology, ecophysiology, ecological
significance:
Physiology and biochemistry:
Distribution, endemism, problematic
citations:
Reference strain:
Korelusová et al. (2009): PCC6308
Infrageneric scheme, species concept:
List of species:
Geminocystis herdmanii Korelusová, Kaštovský et Komárek 2009. J. Phycology 45:933
Geminocystis papuanica Korelusová, Kaštovský et Komárek 2009. J. Phycology 45:934
Keys:
List of stains:
PCC6308 = ATCC 27150, CCAP 1430 ⁄ 1, UTEX 1598, CALU 743
Drawings:
Application technology:
Literature:

  2.1 taxonomy: Korelusová et al. 2009
  2.2 cytomorphology:
  2.3 16S rRNA sequencing: Korelusová et al. 2009
  2.4 biology and life cycles:
  2.5 ecology: