Abstract
Several little known or new species of chroococcalean cyanoprokaryotes (Cyanobacteria, Cyanophyceae) of the generaAphanothece (A. variabilis, A. comasii), Bacularia (B. gracilis), Cyanotetras (C. crucigenielloides) andCyanokybus (C. venezuelae) were found in Cuban freshwater reservoirs. Their taxonomic descriptions and comparison with related species are presented. The chroococcacean speciesCyanokybus venezuelae was originally described bySchiller (1956) from Islas de los Aves near the Venezuelan coast in the Caribbean Sea; it also grows in alkalic, coastal swamps and pools on Cuba. The morphology, variation and life cycle of Cuban populations of this little known species were studied, and its generic delimitation from the genusChroococcus was found to be taxonomically definable. The Cuban samples, which correspond morphologically and ecologically to the Venezuelan diagnosis, represent the second finding of this species after its description, again in the Caribbean region.
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