Descriptions:
Wacklin et al. (2009): Main generic diacritical characters (obligatory for all species):
- The genus Dolichospermum (evaluated by 16S rRNA gene sequencing) belongs genetically into the unique cluster of nostocalean heterocytous cyanobacteria.
- This genetically separated group (Dolichospermum) represents a complex cluster, the different members of which do not differ less than in 92% of 16S
rRNA gene similarity one from another.
- Trichomes are isopolar, metameric with respect to heterocytes position, with constrictions at cross-walls, without firm sheaths, sometimes with fine
mucilaginous, diffluent envelopes. The growth of trichomes is theoretically endless.
- Apical cells are morphologically similar to vegetative cells, they are not differentiated and are able to divide.
- Gas vesicles occur obligatorily in cells in vegetative phase. They are joined into irregular aerotopes (sooner “gas vesicles”) over the whole cell volume;
aerotopes are recognizable in cells under optical microscope.
- Heterocytes arise intercalarly, solitary (exceptionally in pairs); they develop from vegetative cells in ± metameric position.
- Akinetes develop paraheterocytically, it means connected with heterocytes, rarely aside heterocytes from both sides or (more commonly) separated from them
by several cells, solitary up to 5(6) in a row. They develop successively in the direction from heterocytes and often arise after fusion of two or few neighbouring vegetative cells. The ripe akinetes are usually three or more-times larger than vegetative cells.
- All species (morphotypes) are planktic in vegetative state, never form sessile mats on the substrate. The filaments live solitary or in small clusters.
Autapomorphic characteristics: Filaments living isolated or in free clusters; metameric structure of trichomes with heterocytes developing solitary;
obligatory gas vesicles in vegetative cells; akinetes develop paraheterocytically.
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List of species:
Dolichospermum affine (Lemmermann) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 61
Dolichospermum akankoense (M. Watanabe) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 61
Dolichospermum arcticum (Kiselev) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 61
Dolichospermum bituri (Cronberg et Komárek) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 61
Dolichospermum berezowskii (Usačev) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 61
Dolichospermum bothai (Welsh) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 61
Dolichospermum caspicum (Ostenfeld) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 61
Dolichospermum circinale (Rabenhorst ex Bornet et Flahault) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 61
Dolichospermum citrisporum (M. Watanabe) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 61
Dolichospermum compactum (Nygaard) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 61
Dolichospermum crassum (Lemmermann) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 61
Dolichospermum curvum (Hill) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 61
Dolichospermum danicum (Nygaard) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 61
Dolichospermum delicatulum (Lemmermann) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 61
Dolichospermum ellipsoides (Bolochoncev ex Voronichin) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 61
Dolichospermum fallax (Komárek et Komárková-Legnerová) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 61
Dolichospermum farciminiforme (Cronberg et Komárková-Legnerová) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 61
Dolichospermum flos-aqauae ([Lyngbye] Brébisson ex Bornet et Flahault) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 61
Dolichospermum fuscum (Hill) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 61
Dolichospermum halbfassii (Bachmann) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 61
Dolichospermum helicoideum (Bernard) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 61
Dolichospermum heterosporum (Nygaard) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 61
Dolichospermum jacuticum (Kiselev) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 62
Dolichospermum lemmermannii (Richter in Lemmermann) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 62
Dolichospermum longicellulare (Pankow) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 62
Dolichospermum macrosporum (Klebahn) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 62
Dolichospermum maximum (Cronberg et Komárek) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 62
Dolichospermum mendotae (Trelease) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 62
Dolichospermum mucosum (Komárková-Legnerová et Eloranta) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 62
Dolichospermum nathii (Vasishta) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 62
Dolichospermum nygaardii (Cronberg et Komárek) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 62
Dolichospermum perturbatum (Hill) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 62
Dolichospermum planctonicum (Brunnthaler) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 62
Dolichospermum pseudocompactum (M. Watanabe) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 62
Dolichospermum sigmoideum (Nygaard) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 62
Dolichospermum skujae-laxum (Komárek et Zapomělová) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 62
Dolichospermum smithii (Komárek) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 62
Dolichospermum solitarium (Klebahn) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 62
Dolichospermum spiroides (Klebahn) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 62
Dolichospermum torques-reginae (Komárek) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 62
Dolichospermum viguieri (Denis et Frémy) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 62
Dolichospermum werneri (Brunnthaler) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 62
Dolichospermum zinserlingii (Kosinskaja) Wacklin, Hoffmann et Komárek 2009. Fottea 9(1): 62
Unclear taxa:
Anabaena discoidea (Schmidle) Ostenfeld 1908
Anabaena scheremetievii Elenkin 1909
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