- Gram-negative Bacteria of medical and commercial importance: (1984)
- Spirochetes, spiral and curved, aerobic and facultatively aerobic rods, obligate anaerobes, aerobic and anaerobic cocci, sulfate and sulfur-reducing, rickettsias, clamydias, mycoplasmas
- Gram-positive Bacteria of medical and commercial importance: (1986)
- Cocci, endospore-forming and nonsporing rods, mycobacteria, nonfilamentous actinomycetes
- Spirochetes, spiral and curved, aerobic and facultatively aerobic rods, obligate anaerobes, aerobic and anaerobic cocci, sulfate and sulfur-reducing, rickettsias, clamydias, mycoplasmas
Kingdom Procaryotae
Divisions
- Gracilicutes
- Procaryotes with thin cell walls, implying a gram-negative type cell wall
- Firmicutes
- Procaryotes with thick and strong skin, indicating a gram-positive type cell wall
- Tenericutes
- Procaryotes of a pliable and soft nature, indicating the lack of a rigid cell wall
- Mendosicutes
- Procaryotes that lack conventional peptidoglycan (archaeobacteria)
- Procaryotes with thin cell walls, implying a gram-negative type cell wall
- Spirochetes
- Spirochaetales
- Spirochaetaceae
- Borrelia
Cristispira
Spirochaeta
Treponema
- Leptospiraceae
- Leptospira
- Other: Hindgut Spirochetes of Termites and Cryptocercus punctulatus (wood-eating cockroach)
- Aerobic/Microaerophilic, Motile, Helical/Vibrioid Gram-Negative Bacteria
- Alteromonas
Aquaspirillum
Azospirillum
Bdellovibrio
Campylobacter
Cellvibrio
Halovibrio
Helicobacter
Herbaspirillum
Marinomonas
Micavibrio
Oceanospirillum
Spirillum
Sporospirillum
Vampirovibrio
- Nonmotile (or rarely), Gram-Negative Curved Bacteria
- Spirosomaceae
- Flectobacillus
Runella
Spirosoma
Other Genera
- Ancyclobacter
Brachyarcus
Cyclobacterium
Meniscus
Microcyclus
Pelosigma
- Gram-Negative Aerobic Rods and Cocci
- Pseudomonadaceae
- Frateuria
Pseudomonas
Xanthomonas
Zooglea
Azotobacteriaceae
- Azomonas
Azotobacter
Rhizobiaceae
- Agrobacterium
Bradyrhizobium
Phyllobacterium
Rhizobium
Methylococcaceae
- Methylococcus
Methylomonas
Acetobacteraceae
- Acetobacter
Gluconobacter
Halobacteriaceae
- Halobacterium
Halococcus
Legionellaceae
- Legionella
Neisseriaceae
- Acinetobacter Kingella
Moraxella
Neisseria
Other Genera
- Acidiphilium
Acidomonas
Acidothermus
Afipia
Agromonas
Alcaligenes
Alteromonas
Aminobacter
Aquaspirillum
Azorhizobium
Beijerinckia
Bordetella
Brucella
Chromohalobacter
Chryseomonas
Comoamonas
Cupriavidas
Deleya
Derxia
Ensifer
Erythrobacter
Flavimonas
Flavobacterium
Francisella
Halomonas
Hydrogenophaga
Janthinobacterium
Lampropedia
Marinobacter
Marinomonas
Mesophilobacter
Methylobacillus
Methylobacterium
Methylophaga
Methylophilus
Methylovorus
Morococcus
Oceanospirillum
Oligella
Paracoccus
Phenylobacterium
Psychrobacter
Rhizobacter
Roseobacter
Rugamonas
Serpens
Sinorhizobium
Sphingobacterium
Thermoleophilum
Thermomicrobium
Thermus
Variovorax
Volcaniella
Weeksella
Xanthobacter
Xylella
Xylophilus
Zoogloea
- Facultatively Anaerobic Gram-Negative Rods
- Enterobacteriaceae
- Arsenophonus
Budvicia
Buttiauxella
Cedecea
Citrobacter
Edwardsiella
Enterobacter
Erwinia
Escherichia
Ewingella
Hafnia
Klebsiella
Kluyvera
Leclercia
Leminorella
Moellerella
Morganella
Obesumbacterium
Pantoea
Pragia
Proteus
Providencia
Rahnella
Salmonella
Serratia
Shigella
Tatumella
Xenorhabdus
Yersinia
Yokenella
Vibrionaceae
- Aeromonas
Enhydrobacter
Photobacterium
Plesiomonas
Vibrio
Pasturellaceae
- Actinobacillus
Haemophilus
Pasteurella
Other Genera
- Calymmatobacterium
Cardiobacterium
Cedecea
Eikenella
Gardnerella (has thin, gram-positive walls but stains as negative)
Kluyvera
Obesumbacterium
Rahnella
Streptobacillus
Tatumella
XenorhabdusChromobacterium
Zymomonas
- Gram-Negative Anaerobic, Straight, Curved, and Helical Rods
- Bacteroidaceae
- Acetivibrio
Acetoanaerobium
Acetofilamentum
Acetogenium
Acetomicrobium
Acetothermus
Acidaminobacter
Anaerobiospirillum
Anaerorhabdus
Anaerovibrio
Bacteroides
Butyrivibrio (has thin, gram-positive walls but stains as negative)
Centipeda
Fervidobacterium
Fibrobacter
Fusobacterium
Haloanaerobium
Halobacteroides
Ilyobacter
Lachnospira (has thin, gram-positive walls but stains as negative)
Leptotrichia
Malonomonas
Megamonas
Mitsuokella
Oxalobacter
Pectinatus
Pelobacter
Porphyromonas
Prevotella
Propionigenium
Propionispira
Rikenella
Roseburia
Ruminobacter
Sebaldella
Selenomonas
Sporomusa
Succinimonas
Succinivibrio
Syntrophobacter
Syntrophosmonas
Thermobacteroides
Thermospipho
Thermotoga
Tissierella
Wolinella
Zymophilus
Dissimulatory Sulfate- or Sulfur-Reducing Bacteria
- Desulfobacter
Desulfobacterium
Desulfobulbus
Desulfococcus
Desulfomicrobium
Desulfomonas
Desulfomonile
Desulfonema
Desulfosarcina
Desulfotomaculum (also endospore-forming)
Desulfovibrio
Desulfurella
Desulfuromonas
Thermodesulfobacterium
Anaerobic Gram-Negaitve Cocci
- Veillonellaceae
- Acidaminococcus
Megasphaera
Syntrophococcus
Veillonella
- Rickettsias and Chlamydias
- Rickettsiales
- Rickettsiaceae
- Cowdria
Coxiella
Ehrlichia
Neorickettsia
Rickettsia
Rickettsiella
Rochalimaea
Wolbachia
Bartonellaceae
- Bartonella
Grahamella
Anaplasmataceae
- Aegyptianella
Anaplasma
Eperythrozoon
Haemobartonella
Chlamydiales
- Chlamydiaceae
- Chlamydia
- Mycoplasmas
- Mycoplasmataceae
- Mycoplasma
Ureaplasma
Acholeplasmataceae
- Acholeplasma
Spiroplasmataceae
- Spiroplasma
Other Genera
- Anaeroplasma
Asteroleplasma
Thermoplasma
- Endosymbionts
- Endosymbionts of Protozoa
- Caedibacter
Holospora
Lyticum
Pseudocaedibacter
Tectibacter
Endosymbionts of Insects (blood sucking, plant sap-sucking, cellulose and stored grain feeders, and insects feeding on complex diets)
- Blattabacterium
Endosymbionts of Fungi and Invertebrates other than Arthropods (Fungi, Sponges, Coelenterates, Helminthes, Annelids, Marine worms and mollusks)
Endosymbionts of Protozoa, ciliates, flagellates, and amoebas
- Caedibacter
Holospora
Lyticum
Pseudocaedibacter
Tectibacter
- Gram-Positive Cocci
- Aerobic, Catalase-Positive Genera
- Deinobacter
Deinococcus
Marinococcus
Micrococcus
Planococcus
Saccharococcus
Staphylococcus
Stomatococcus
Aerotolerant, Catalase-Negative Genera
- Aerococcus Enterococcus
Gemella
Lactococcus
Leuconostoc
Melissococcus
Pediococcus
Streptococcus (Pyogenic Hemolytic Streptococci, Oral Streptococci, Enterococci, Lactic Acid Streptococci, Anaerobic Streptococci)
Trichococcus
Vagococcus
Anaerobic, Catalase-Negative Genera
- Coprococcus
Peptococcus
Peptostreptococcus
Ruminococcus
Sarcina
- Endospore-Forming Gram-Positive Rods and Cocci
- Amphibacillus
Bacillus
Clostridium
Desulfotomaculum (also dissimilatory sulfate reducer)
Oscillospira
Sporolactobacillus
Sporosarcina
Sulfidobacillus
Syntrophospora
- Regular, Nonsporing Gram-Positive Rods
- Brochothrix
Carnobacterium
Caryophanon
Erysipelothrix
Kurthia
Lactobacillus
Listeria
Renibacterium
- Irregular, Nonsporing Gram-Positive Rods
- Acetobacterium
Acetogenium
Actinomyces
Aeromicrobium
Agromyces
Arachnia
Arcanobacterium
Arthrobacter
Aureobacterium
Bifidobacterium
Brachybacterium
Brevibacterium
Butyrivibrio (has thin, gram-positive walls, but stains as negative)
Caseobacter
Cellulomonas
Clavibacter
Coriobacterium
Corynebacterium
Curtobacterium
Dermabacter
Eubacterium
Exigouibacterium
Falcivibrio
Gardnerella (has thin, gram-positive walls but stains as negative)
Jonesia
Lachnospira (has thin, gram-positive walls but stains as negative)
Microbacterium
Mobiluncus
Pimelobacter
Propionibacterium
Rarobacter
Rothia
Rubrobacter
Sphaerobacter
Terrabacter
Thermoanaerobacter
- Mycobacteria
- Mycobacteriaceae
- Mycobacterium
- Nocardioforms
- Intrasporangium
Micropolyspora
Nocardia
Nocardioides
Oerskovia
Promicromonospora
Pseudonocardia
Rhodococcus
Saccharopolyspora
- Anoxygenic Phototrophic Bacteria
- Purple Sulfur Bacteria: Internal Sulfur Granules
- Chromatiaceae
- Amoebobacter
Chromatium
Lamprobacter
Lamprocystis
Thiocapsa
Thiocystis
Thiodictyon
Thiopedia
Thiospirillum
- Purple Sulfur Bacteria: External Sulfur Granules
- Ectothiorhodospiraceae
- Ectothiorhodopsin
Ectothiorhodospira
- Purple Nonsulfur Bacteria
- Rhodobacter
Rhodyclus
Rhodomicrobium
Rhodopila
Rhodopseudomonas
Rhodospirillum
- Green Nonsulfur Bacteria
- Heliobacillus
Heliobacterium
- Green Sulfur Bacteria
- Anacalochloris
Chlorobium
Chloroherpeton
Pelodictyon
Prosthecochloris
- Multicellular Filamentous Green Bacteria
- Chloroflexus
Chloronema
Heliothrix
Oscillochloris
- Anaerobic Chemotrophic Bacteria
- Erythrobacter
- Oxygenic Phototrophic Bacteria
- Cyanobacteria
- Chroococcales
- Chamaespiphon
Cyanothece
Gloeobacter
Gloeocapsa
Gloethece
Microcystis
Myxobaktron
Synechococcus
Synechocystis
Pleurocapsales
- Chroococcidiopsis
Dermocarpa
Dermocarpella
Myxosarcina
Pleurocapsa
Xenococcus
Oscillatoriales
- Arthrospira
Crinalium
Lyngbya
Microcoleus
Oscillatoria
Pseudanabaena
Spirulina
Starria
Trichodesmium
Nostocales
- Nostocaceae
- Anabaena
Aphanizomenon
Cylindrospermum
Nodularia
Nostoc
Scytonemataceae
- Scytonema
Rivulariaceae
- Calothrix
Stigonematales
- Chlorogloeopsis
Fischerella
Geitleria
Stigonema
Prochlorales
- Prochloraceae
- Prochloron Prochlorothrix
- Aerobic Chemolithotrophic Bacteria and Associated Organisms
- Nitrifying Bacteria
- Nitrobacteraceae
- Nitrate-oxidizing bacteria
- Nitrobacter
Nitrococcus
Nitrospina
Nitrospira
Ammonia-oxidizing bacteria
- Nitrosococcus
Nitrosolobus
Nitrosomonas
Nitrosospira
Nitrosovibrio
Colorless sulfur-oxidizing bacteria
- Acidiphilium
Macromonas
Thermothrix
Thiobacillus
Thiobacterium
Thiodendron
Thiomicrospira
Thiosphaera
Thiospira
Thiovulum
Obligate Chemolithotrophic Hydrogen Bacteria
- Hydrogenobacter
Iron- and Manganese-oxidizing and/or -Depositing Bacteria
- Siderocapsaceae
- Aquaspirillum
Bilophococcus
Gallionella (both iron-oxidizing and appendaged)
Leptospirillum
Metallogenium
Naumaniella
Ochrobium
Siderocapsa
Siderococcus
Sulfobacillus
- Budding (indicated by *) and/or Appendaged Bacteria
- Prosthecate Bacteria
- Ancalomicrobium *
Asticcacaulus
Caulobacter
Dichotomicrobium
Filomicrobium
Hirschia
Hyphomicrobium *
Hyphomonas *
Labrys *
Pedomicrobium *
Prosthecobacter
Prosthecomicrobium *
Stella *
Verrucomicrobium
Planctomycetales
- Gemmata
Pirelulla
Nonprosthecate Budding Bacteria
- Angulomicrobium
Blastobacter
Ensifer
Gemmiger
Isosphaera
Planctomyces
- Nonbudding Bacteria
- Asticcacaulis
Caulobacter
Gallionella
Nevskia
Prosthecobacter
- Morphologically Unusual Budding Bacteria (involved in iron and manganese deposition)
- Caulococcus
Kuznezovia
Metallogenium
Seliberia
Thiodendron
- Sheathed Bacteria
- Clonothrix
Crenothrix
Haliscominobacter
Leptothrix
Lieskeela
Phragmidiothrix
Sphaerotilus
- Nonphotosynthetic, Nonfruiting Gliding Bacteria
- Single-celled, Rod-shaped Gliding Bacteria
- Cytophagales
- Cytophagaceae
- Capnocytophaga
Chitinophaga
Cytophaga
Flexibacter
Flexithrix
Microscilla
Sporocytophaga
Thermonema
Lysobacterales
- Lysobacteriaceae
- Lysobacter
Flattened, Filamentous Gliding Bacteria
- Simonsiellaceae
- Alysiella
Simonsiella
Sulfur-Oxidizing Gliding Bacteria
- Beggiatoales
- Beggiatoaceae
- Achromatium
Beggiatoa
Thioploca
Thiospirillopsis
Thiothrix
The Pelonemas
- Pelonemataceae
- Achroonema Desmanthus
Pelonema
Peloploca
Other Genera
- Agitococcus
Desulfonema
Herpetosiphon
Isosphaera
Leucothrix
Saprospira
Toxothrix
Vitreoscilla
- Gliding, Fruiting Bacteria
- Archangiaceae
- Archangium
Cystobacteraceae
- Cystobacter
Melittangium
Stigmatella
Myxococcales
- Myxococcaceae
- Myxococcus
Polyangiaceae
- Chondromyces
Nannocystis
Polyangium
Other Genera
- Angiococcus
Corallococcus
Haploangium
Sorangium
Archaeobacteria (an older term for the Archaea)
- The Methanogens
- Cell Walls With Pseudomurein
- Methanobacteriales
- Methanobacteriaceae
- Methanobacterium
Methanobrevibacter
Methanothermaceae
- Methanothermus
Cell Walls Without Pseudomurein
- Methanococcales
- Methanococcaceae
- Methanococcus
Methanosarcinaceae
- Methanolacinia
Methanococcoides
Methanolobus
Methanothrix
Methanomicrobiales
- Methanomicrobiaceae
- Methanomicrobium
Methanogenium
Methanospirillum
Methanoplanaceae
- Methanoplanus
Other Genera
- Methanocorpusculum
Methanoculleus
Methanohalobium
Methanohalophilus
Methanosarcina
Methanosphaera
- Archaeal Sulfate Reducers
- Archaeoglobales
- Archaeoglobaceae
- Archaeoglobus
- Extremely Halophilic, Aerobic Archaeobacteria
- Halobacteriales
- Halobacteriaceae
- Haloarcula
Halobacterium
Halococcus
Haloferax
Natronobacterium
Natronococcus
- Cell Wall-Less Archaeobacteria
- Thermoplasma
- Extremely Thermophilic and Hyperthermophilic So – Metabolizers
- Cocci, Optimum Growth Below pH4
- Desulfurolobus Metallosphaera
Sulfolobales
- Sulfolobaceae
- Acidianus
Sulfolobus
Rods That Use H2 as Energy Source
- Pyrobaculum
Thermoproteales
- Thermoproteaceae
- Thermofilum
Thermoproteus
Cocci or Disc-Shaped That Oxidize H2S
- Hyperthermus
Staphylothermus
Thermodiscus
- Desulfurococcaceae
- Desulfurococcus
Pyrodictium
Thermococcales
- Thermococcaceae
- Thermococcus
Pyrococcus
Actinomycetes
- Nocardioform Actinomycetes
- Actinobispora
Actinokineospora
Actinopolyspora
Amycolata
Amycolatopsis
Faenia (Micropolyspora)
Gordona
Intrasporangium
Jonesia
Kibdelosporangium
Nocardia
Nocardioides
Oerskovia
Promicromonospora
Pseudoamycolata
Pseudonocardia
Rhodococcus
Saccharomonospora
Saccharopolyspora
Terrabacter
Tsukamurella
- Actinomycetes With Multilocar Sporangia
- Dermatophilus
Frankia
Geodermatophilus
- Actinoplanetes
- Actinoplanes
Ampullariella
Catelbatospora
Dactylosporangium
Micromonospora
Pilimelia
- Streptomyces and Related Genera
- Intrasporangium
Kineosporia
Sporichthya
Streptomyces
Streptoverticillium
- Maduromycetes
- Actinomadura
Microbispora
Microtetraspora
Planobispora
Planomonospora
Spirillospora
Streptosporangium
- Thermomonospora and Related Genera
- Actinosynnema
Nocardiopsis
Streptoalloteichus
Thermomonospora
- Thermoactinomycetes
- Thermoactinomyces
- Other Actinomycete Genera
- Glycomyces
Kibdelosporangium
Kitasatosporia
Saccarothrix