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Wollea

Generic name: WOLLEA Bornet et Flahault 1888. Ann. Sci. Nat. Bot., ser. 7, 7: 223.
Synonyms: [WOLLEA Bornet et Flahault, 1888: Sphaerozyga sp.]
Diagnosis:
Bornet et Flahault (1888): Thallus tubulosus, cylindricus, mollis. Fila subrecta paralleliter agglutinata vel leniter curvato-implicata, vaginis confluentibus. Heterocystae intercalares. Sporae catenatae heterocystis contiguae vel ab eis remotae. (Conf. Wolle, Fresh-water Algae of the United-States, p. 290, tab. 199, fig. 1.)
Type species: Wollea saccata (Wolle) Bornet et Flahault 1888
Descriptions:
Komárek (1992): Filamentous - colonial; colonies macroscopic, gelatinous, smooth on the surface, more or less cylindrical or subspherical, sometimes tube-like, submersely living. Trichomes of the same width along the whole length, more or less straight or slightly curved, uniseriate, not branched, not attenuated or widened at the ends, intensely constricted at cross walls; terminal cells rounded; irregularly or more or less parallely and densely arranged in common, diffluent mucilage. On the surface of colonies is the fine pelicula; sheaths around trichomes are absent. Heterocytes intercalar, solitary, causing probably the metameric structure of trichomes. Akinetes arise paraheterocytic, at both sides of heteocytes, in short series, spherical or oval.
Genotype differences, molecular data:
Reproduction strategies, life cycles, cell division:
Komárek (1992): Cells divide only by crosswise binary fission. Reproduction by hormogonia.
Ultrastructure:
Taxonomic position, higher hierarchy: Cyanophyceae,
Nostocales, Nostocaceae, Anabaenoideae
Notes to taxonomy, misinterpretations:
Ecology, ecophysiology, ecological significance:
Komárek (1992): Freshwater species; the type-species is known from several localities (stagnant waters) in North America (firstly joined to the substrate, later free floating). The second species (W. bharadwajae) was described from pond and paddy field bottom in India.
Physiology and biochemistry:
Distribution, endemism, problematic citations:
Reference strain:
Infrageneric scheme, species concept:

List of species:
Wollea ambigua (Rao) R.N. Singh 1942
Wollea bharadwayae R.N. Singh 1942
Wollea lemnae Guerrero 1947
Wollea saccata Bornet et Flahault 1888. Ann. Sci. Nat. Bot., ser.VII, 7: 223
Wollea udaipurensis Gupta et Kumar 1968
Wollea vaginicola (Fritsch et Rich) R.N. Singh 1942

Unclear taxa:
Wollea cylidrica (Randhawa et Ghose) R.N. Singh 1942
Wollea epiphytica (Randhawa et Ghose) R.N. Singh 1942

Keys:
List of stains:
Drawings:
Komárek 1992
Application technology:
Literature:

  2.1 taxonomy: Geitler 1932, Singh 1942, Desikachary 1959, Komárek 1992
  2.2 cytomorphology:
  2.3 16S rRNA sequencing:
  2.4 biology and life cycles:
  2.5 ecology: