Fottea, 2008 (vol. 8), issue 1

Planktic morphospecies of the cyanobacterial genus Anabaena = subg. Dolichospermum - 2. part: straight types.

Jiří Komárek, Eliška Zapomělová

Fottea 8(1): 1-14, 2008 | 10.5507/fot.2008.001  

This small tropical cyanobacterial group, containing Anabaena volzii Lemmermann and a few related species (A. fuellebornii SCHMIDLE, A. unispora GARDNER, A. mysorensis GONZALVES & KAMAT), differs substantially phenotypically from all other planktic or benthic Anabaena types, mainly by the subsymmetric structure of the trichomes, type of akinete formation and restricted ecology. The taxonomic uniformity of all other Anabaenalike clusters (typical benthic Anabaena, planktic Anabaena subg. Dolichospermum, Trichormus, Aphanizomenon, Cuspidothrix) was already supported by molecular analyses. All of them also have their typical morphological markers,...

Revision of the diatom genus Sellaphora: a first account of the larger species in the British Isles.

David G. Mann, Sindu J. Thomas, Katharine M. Evans

Fottea 8(1): 15-78, 2008 | 10.5507/fot.2008.002  

As a step towards a global monograph of the freshwater diatom genus Sellaphora, we made detailed surveys of Sellaphora diversity in the epipelon of 38 lakes and ponds and three Holocene diatomites in the British Isles, restricting our analysis to those specimens that would be classified in S. americana, S. bacillum, S. pupula or S. laevissima according to the standard European diatom flora of KRAMMER & LANGE-BERTALOT (1986; Süsswasserflora von Mitteleuropa, vol. 2/1. - G. Fischer, Stuttgart & New York). From a total of c. 104 specimens observed, over 3200 were recorded as digital images and sorted into 54 mostly...

The cyanobacterial genus Macrospermum.

Jiří Komárek

Fottea 8(1): 79-86, 2008 | 10.5507/fot.2008.003  

This small tropical cyanobacterial group, containing Anabaena volzii LEMMERMANN and a few related species (A. fuellebornii SCHMIDLE, A. unispora GARDNER, A. mysorensis GONZALVES & KAMAT), differs substantially phenotypically from all other planktic or benthic Anabaena types, mainly by the subsymmetric structure of the trichomes, type of akinete formation and restricted ecology. The taxonomic uniformity of all other Anabaenalike clusters (typical benthic Anabaena, planktic Anabaena subg. Dolichospermum, Trichormus, Aphanizomenon, Cuspidothrix) was already supported by molecular analyses. All of them...