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Ammatoidea

Generic name: AMMATOIDEA W. et G.S. West, 1897. J. Roy. Microsc. Soc. London 1897: 506.
Synonyms:
Diagnosis:
Type species: Ammatoidea normannii W. et G.S. West 1897. - Seven.revised species from eleven described.
Descriptions:
Komárek (1992): Filamentous; filaments isopolar, long, solitary or in groups, cylindrical, in the middle usually arcuated or irregularly curved, with firm sheaths, which are sometimes yellowish brown coloured and layered; sometimes occur false branchings. Trichomes at cross walls slightly constricted or unconstricted, uniserial, attenuated at both ends and sometimes terminated by long, thin hairs with co1ourless cells. Heterocytes and akinetes always missing.
Genotype differences, molecular data:
Reproduction strategies, life cycles, cell division:
Komárek (1992):Cell division crosswise to the long axis of trichomes. Reproduction by hormogonia, which develop regularly at both ends of trichomes.
Ultrastructure:
Taxonomic position, higher hierarchy:
Cyanophyceae, Oscillatoriales, Ammatoideaceae
Notes to taxonomy, misinterpretations:
Ecology, ecophysiology, ecological significance:
Komárek (1992):The type species (A. normannii) occurs sporadically in periphyton and metaphyton on water plants in clear and cold streaming waters and in littoral of clear, unpolluted lakes. Localities are known allover the world, but the taxonomic identity of all floristic data is not clear. One species was described from a spring in Georgia (USSR), the another one from thermal springs in the Yellowstone National Park (U.S.A.).
Physiology and biochemistry:
Distribution, endemism, problematic citations:
Reference strain:
Infrageneric scheme, species concept:

List of species:

Typical types
Ammatoidea multispora Yoneda 1952
Ammatoidea murmanica Petrov 1961
Ammatoidea normannii W. et G.S. West 1897
Ammatoidea olivacea Yoneda 1952
Ammatoidea simplex Voronichin 1923
Ammatoidea singularis Hirose et Chung in Chung 1970
Ammatoidea xizangensis Zhu et Li in Li 1984
Ammatoidea yellowstonensis Copeland 1936

Types with very short cells
Ammatoidea aegea Anagnostidis et Pantazidou 1991
Ammatoidea breviarticulata Hirose et Chung 1970
Ammatoidea sinensis Ley 1944

Unclear taxa:
 Plectonema calothrichoides Gomont 1899

Keys:
List of stains:
Application technology:
Drawings:Ammatoidea Komárek (1992)
Literature:

  2.1 taxonomy: Geitler 1932, Elenkin 1949, Hollerbach et al. 1955, Starmach 1960, Komárek 1992, Komáerk & Anagnostidis 2005
  2.2 cytomorphology:
  2.3 16S rRNA sequencing:
  2.4 biology and life cycles:
  2.5 ecology: