Central Taxonomic Thesaurus
Organism
Bacteria
Cyanobacteria
Cyanophyceae
Chamaesiphonales
Chroococcales
Nostocales
Nostocophycideae
Oscillatoriophycideae
Firmicutes
Clostridia
Clostridiales
Gracilicutes
Proteobacteria
Gammaproteobacteria
Enterobacteriales