Anabaenopsis
| Generic name: ANABAENOPSIS (Woloszyńska) Miller 1923. Arch. Russk. Protistol. 2: 125. | ||||||||||
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| Type species: Anabaenopsis elenkinii Miller 1923. | ||||||||||
| Descriptions: Komárek (1992):Filamentous; filaments solitary or in free clusters with several tangled trichomes, free floating, along the length of the same width, without (rarely) or with constrictions at the cross walls, straight, arcuated or irregularly screw-like or spirally coiled, without sheaths, but sometimes with very diffluent, colourless, homogeneous slimy envelopes (staining!); trichomes originally metameric (the heterocytes develop intercalary in pairs in certain distances one from another), but trichomes often disintegrate soon after heterocyte formation between heterocytes, the position of which i,s finally terminal in short disintegrated fragments of an original trichome (usual stage of population). Cells cylindrical or barrel-shaped, shorter up to several times longer than wide, pale blue-green, usually containing aerotopes facultatively missing). Heterocytes develop after the asymmetrical, mirror-like division of two neighbouring proheterocytic cells, spherical or widely oval, rarely ovoid or elongated, rounded conical, usually slightly greater than vegetative cells. Akinetes spherical or oval, solitary or several in a short row, intercalar (rarely occur terminal after disintegration of trichomes), arise always paraheterocytic, but usually a slightly distant from heterocytes. |
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| Genotype differences, molecular data: | ||||||||||
| Reproduction strategies, life cycles, cell division: Komárek (1992): Cells divide cross-wise, sometimes asymmetrically, and grow to the original size before the next division; all cells capable to divide; without meristematic zones. Reproduction by trichome fragmentation and by akinetes. |
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| Ultrastructure: | ||||||||||
| Taxonomic position, higher hierarchy: Cyanophyceae, Nostocales, Notocaceae, Anabaenoideae Notes to taxonomy, misinterpretations: |
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| Ecology, ecophysiology, ecological significance: Komárek (1992): Planktic species forming sometimes water blooms, rarely occur in metaphyton of small water bodies with submerse vegetation and in paddy fields (the non-planktic species need revision). Mainly distributed in tropical and subtropical regions, but occur commonly also in summer seasons in warmer areas of temperated zones. Several species prefer alkalic and highly mineral or salinic waters. |
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| Physiology and biochemistry: |
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| Distribution, endemism, problematic citations: |
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| Reference strain: |
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| Infrageneric scheme, species concept: |
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List of species:
Unclear taxa |
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| Keys: Taylor(1932)  |
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| List of stains: |
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Drawings: Komárek (1992)
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Literature:
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