Dichotomous Key/Bacteria
Include the cyanobacteria (autotrophic) and eubacteria (heterotrophic).
- Acidobacteria (acidophilic, gram positive, high G+C, common in dirt)
- Actinobacteria (high G+C gram positive bacteria)
- Aquificae (hyperthermophilic chemolithoautotrophs, gram negative)
- Bacteroidetes (really diverse group with pathogens, commensals, and free-living bacteria; anaerobic, gram negative, rod shaped)
- Chlamydiae (obligate intracellular parasites of eukaryotic cells, gram negative)
- Chlorobi (anaerobic, photoautotrophic, gram negative green sulfur bacteria)
- Chloroflexi (greeen nonsulfur bacteria)
- Chrysiogenetes (chemolithoautotrophic bacterium)
- Cyanobacteria (oxygenic photosynthetic bacteria and chloroplasts)
- Deferribacteres (aquatic, anaerobic bacteria)
- Deinococcus-Thermus (extremophiles, gram negative)
- Dictyoglomi (thermophilic chemoorganotrophs)
- Fibrobacteres (cellulose digesting, anaerobic rumen bacteria, two species)
- Firmicutes (low G+C gram positives)
- Fusobacteria (obligate anaerobic heterotrophs, many involved in human infections, gram negative, non-spore forming)
- Gemmatimonadetes (Gram negative bacteria lacking DAP in cellular envelopes)
- Nitrospira (gram negative; includes nitrite-oxicizers, thermophilic sulfate reducers, and acidophilic iron reducers)
- Planctomycetes (ovoid gram negative bacteria, reproduce by budding)
- Proteobacteria (purple bacteria and relatives, gram negative)
- Spirochaetes (spiral-shaped chemoheterotrophs, gram negative)
- Synergistetes (gram negative, rod/vibroid cell shape)
- Tenericutes (gram positive, no cell wall)
- Thermodesulfobacteria (thermophilic, sulfate-reducing bacteria)
- Thermomicrobia (hyperthermophilic chemoheterotrophs)
- Thermotogae (hyperthermophilic, obligate anaerobic, fermentive heterotrophs)
- Verrucomicrobia (terrestrial, aquatic, some associated with eukaryotic hosts; gram negative)