Hi, One of my students used recently the following reference for some caribbean benthic cyanobacteria based on morphological and morphometric characteristics
Komárek J., Anagnostidis K. 2005. Cyanoprokaryota -2. Teil/ 2nd Part: Oscillatoriales. En: Büdel B., Krienitz L., Gärtner G., Schagerl M. (eds), Süsswasserflora von Mitteleuropa 19/2, Elsevier/Spektrum, Heidelberg, 759 pp.
However, It was not enough. Recently Niclas Engene is generating new information where molecular and chemical information can be helpful for identification of our cyanobacteria. COnsider this, because it can be your case too
Engene N, Choi H, Esquenazi E, Rottacker EC, Ellisman MH, Dorrestein PC, Gerwick WH. 2011. Environmental Microbiology, 13(6): 1601–1610.
Engene, N., E. C. Rottacker, J. Kasvtovsky, T. Byrum, H. Choi, M. H. Ellisman, J. Komárek y W. H. Gerwick. 2012. . International Journal of Systematic and Evololutionary Microbiology, 62: 1171–1178.
Engene et al., 2013 J. Phycol. DOI: 10.1111/jpy.12115
Marine cyanobacteria books.google.fr/books?id=R-jaAAAAMAAJ - Traduire cette page Loïc Charpy, A. W. D. Larkum - 1999 - Extraits
Marine Pelagic Cyanobacteria: Trichodesmium and other ... books.google.fr/books?isbn=0792316142 - Traduire cette page E.J. Carpenter, D.G. Capone, John G. Rueter - 1992 - Aperçu This volume focuses on the filamentous cyanobacteria, particularly those in the genus Trichodesmium which are common in tropical and subtropical seas. A portion of this book also concerns bloom-forming cyanobacteria in the Baltic Sea area.