cyanobacterial phylogeny

A curated 16S rRNA phylogeny with over 4000 members. The taxonomy is correlated with trees of 1000 total, 250 complete and 300 picocyanobacterial genomes. Errors in cyanobacterial nomenclature are exposed and type species and problematic genera are discussed.

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Many pages are formatted as PDF; all pages may be searched, printed or downloaded. All phylogenetic trees, except the orders tree, have multiple, overlapping, pages. Other links are directly available on the main text page. The contents of the site are updated regularly with new or revised genera or species, and new genomic sequences are added when available. All data are available for download.

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This ad-free site was created by Mike Herdman and Rosi Rippka,
January 1 2017

NEW: release 15.0 replaced the previous version (February 2003);
see the changelog for details.

Cyanobacterial phylogeny. Some genera added for this release: Khargia, Ocullathermofonsia, Trichothermofonsia.

contact Questions or comments: write to mherdman1245(at)