Microbial Biorealm

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A Microbial Diversity Resource

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Microbial Phylogeny

The three Domains of Life each have defining characteristics that are both separate and similar.
Within each Domain these ranks are shown: Division, Order, Genus. Links provide full taxonomy and description. See also Taxonomy Index.

Bacteria	Archaea	Eukarya
Acidobacteria Acidobacteriaceae Candidatus Chloracidobacterium Actinobacteria Actinomycetales Arthrobacter Corynebacterium Frankia Micrococcus Mycobacterium Propionibacterium Streptomyces Bifidobacteriales Bifidobacterium Aquificae Aquificales Aquifex Bacteroidetes/Chlorobi group Bacteroidales Bacteroides Porphyromonas Chlorobiales Chlorobium Flavobacteriales Flavobacterium Chlamydiae/Verrucomicrobia Chlamydiales Chlamydia Verrucomicrobiales Prosthecobacter Verrucomicrobium Chloroflexi Chlorflexales Chloroflexus Cyanobacteria Chloroplast Chroococcales Chroococcus Merismopedia Synechococcus Nostocales Anabaena Nostoc Oscillatoriales Spirulina Trichodesmium Pleurocapsales Pleurocapsa Prochlorophytes Prochlorococcus Prochloron Firmicutes (Gram positive) Bacillales Bacillus Listeria Staphylococcus Clostridiales Clostridium Dehalobacter Epulopiscium Ruminococcus Lactobacillales Enterococcus Lactobacillus Streptococcus Mollicutes Erysipelothrix Mycoplasma Nitrospirae Nitrospirales Leptospirillum Nitrospira Thermodesulfobacterium Planctomycetes Planctomycetales Gemmata Pirellula Planctomyces Proteobacteria (Alpha) Caulobacterales Caulobacter Rhizobiales Agrobacterium Bradyrhizobium Brucella Methylobacterium Prosthecomicrobium Rhizobium Rhodopseudomonas Sinorhizobium Rhodobacterales Rhodobacter Roseobacter Rhodospirales Acetobacter Rhodospirillum Rickettsiales Rickettsia Rickettsia conorii Mitochondria Wolbachia Sphingomonadales Erythrobacter Erythromicrobium Sphingomonas Proteobacteria (Beta) Burkholderiales Alcaligenes Burkholderia Leptothrix Sphaerotilus Hydrogenophilales Thiobacillus Neisseriales Neisseria Nitrosomonadales Nitrosomonas Gallionella Spirillum Rhodocyclales Azoarcus Proteobacteria (Gamma) Aeromonadales Aeromonas Succinomonas Succinivibrio Ruminobacter Chromatiales Nitrosococcus Thiocapsa Enterobacteriales Enterobacter Escherichia Klebsiella Salmonella Shigella Wigglesworthia Yersinia Legionellales Coxiella Legionella Oceanospirales Halomonas Pasteurellales Pasteurella Pseudomonadales Acinetobacter Azotobacter Pseudomonas Psychrobacter Thiotrichales Beggiatoa Thiomargarita Vibrionales Vibrio Xanthomonadales Xanthomonas Proteobacteria (Delta/Epsilon) Bdellobvionales Bdellovibrio Campylobacterales Campylobacter Helicobacter Myxococcales Myxococcus Desulfobacterales Desulfosarcina Desulfuromonadales Geobacter Desulfuromonas Spirochaetes Spirochaetales Borrelia Leptospira Treponema Thermotogae Thermotogales Petrotoga Thermotoga Thermus/Deinococcus group Deinococcales Deinococcus Thermales Thermus	Crenarchaeota Caldisphaerales Caldisphaera Desulfurococcales Acidilobus Aeropyrum Desulfurococcus Hyperthermus Pyrodictium Ignicoccus Thermosphaera Sulfolobales Sulfolobus Sulfurisphaera Thermoproteales Euryarchaeota Archaeoglobales Archaeoglobus Haloarchaea (Halobacteriales) Haloarcula Halobacterium Halococcus Haloferax Haloquadra Halorhabdus Natronococcus Natronomonas Methanobacteriales Methanothermobacter Methanosphaera Methanococcales Methanococcus Methanoculleus Methanomicrobiales Methanofollis Methanosarcinales Methanosarcina Methanopyrales Methanopyrus Thermococcales Pyrococcus Thermococcus Thermoplasmatales Ferroplasma Picrophilus Thermoplasma Thermoproteales Pyrobaculum Korarchaeota Nanoarchaeota Nanoarchaeum	Opisthokonta Metazoa (multicellular animals) Choanoflagellata Fungi (Eumycota, true fungi) Ascomycota Aspergillus Cladosporium Magnaporthe Morchella Neurospora Penicillium Saccharomyces Basidiomycota Cryptococcus Ustilago Chytridiomycota Microsporidia Zygomycota Viridiplantae (algae & plant) Multicellular Plants Charophyta Chlorophyta Rhodophyta Amebozoa Amebas Pelobionta Myxomycota (slime molds) Dictyostelida Myxogastria (myxomycetes) Protostelida Cercozoa (shelled amebas) Foraminifera Radiolaria Euglyphids Alveolata (have cortical alveoli) Ciliophora Didinium Paramecium Stentor Suctoria Vorticella Dinoflagellata Alexandrium Ceratium Pfiesteria Zooxanthellae Apicomplexa Piroplasmida Babesia Haemosporida Leukocytozoon Plasmodium Coccidia Cryptosporidium Cyclospora Sarcocystis Marine flagellates (other) Heterokonta (Stramenopiles) Bicosoecids Chrysophyta Actinophrydae Bacillariophyta (diatoms) Chrysophyceae Xanthophyceae Oomycota Labyrinthulids Opalinids Phaeophyceae (kelp) Haptophytes Emiliania Discicristata Acrasids Euglenozoa Trypanosoma Trypanosoma Leishmania Excavata Diplomonads Giardia Oxymonads Parabasalids Mixotricha Trichomonas Retortamonads Emerging Eukaryotes Nano- and Picoeukaryotes