Phylogeny of 58 cyanobacteria based on a concatenated alignment of core orthologs. Maximum likelihood phylogenetic tree based on a concatenated alignment of 285 single-copy orthologs present in all genomes. The cyanobacteria with fully developed heterocysts with a regular intercalary pattern distribution are indicated by the dark green shaded box while those with terminal or undeveloped heterocysts are indicated by the light green shaded box. Specific phenotypes are shown by the coloured boxes next to the organism names. Numbers at nodes indicate bootstrap values (when < 100). Bar, 0.4 expected substitutions per site.