Fottea 11(1): 25-30, 2011 | DOI: 10.5507/fot.2011.004

New morphospecies of Chamaesiphon (Cyanobacteria) from Atlantic rainforest, Brazil.

Célia L. Sant´Anna*,1, Watson A. Gama Jr.1, Maria Teresa P. Azevedo1, Jiøí Komárek2
1 Institute of Botany, Laboratory of Phycology, São Paulo, SP, Brazil
2 Faculty of Science, University of South Bohemia, Èeské Budĕjovice, Czech Republic

The Atlantic rainforest is considered one of the most important hotspots of biodiversity on Earth. This great diversity results from the variation of climatic conditions (rainy, warm and cold in high mountains), what generates a unique series of rain forest ecosystems quite distinct from each other. Unfortunately, due to the human impact over the centuries, today there are just fragments of preserved native rainforest. During the investigation
about the cyanobacterial flora from the Atlantic rainforest, a special Chamaesiphon morphotype was found on a rock in streaming water. Chamaesiphon stratosus sp. nova is close to C. britannicus (Fritsch) Komárek et Anagn., C. geitleri Luther and C. fuscus (Rostaf.) Hansg ., and differs from them mainly because of the cells disposition in one layer and exocytes liberation in a sheath at the upper part of cells. These two features belong to different subgenera of Chamaesiphon (Godlewskia and Chamaesiphonopsis). Thus, the Brazilian material displays features of both subgenera and puts in evidence the fragility of these characteristics at subgenus level. Therefore, a discussion about the taxonomy of these subgenera and a proposal for including Chamaesiphonopsis as a synonym of the Godlewskia were done.

Keywords: Brazil, Atlantic rainforest, Chamaesiphon, new morphoespecies, epilithic habitat

Published: March 1, 2011  Show citation

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Sant´Anna, C.L., Gama, W.A., Azevedo, M.T.P., & Komárek, J. (2011). New morphospecies of Chamaesiphon (Cyanobacteria) from Atlantic rainforest, Brazil. Fottea, 11(1), 25-30. doi: 10.5507/fot.2011.004
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