| Class III. Gammaproteobacteria |
| Order IV. Cardiobacteriales |
| Order III. Xanthomonadales |
| Order II. Acidithiobacillales |
| Order VII. Methylococcales |
| Order VIII. Oceanospirillales |
| Class IV. Deltaproteobacteria |
| Order VII. Bdellovibrionales |
| Order VI. Syntrophobacterales |
| Order V. Desulfuromonales |
| Order III. Desulfobacterales |
| Order II. Desulfovibrionales |
| Class V. Epsilonproteobacteria |
| Order I. Campylobacterales |
| Class II. Betaproteobacteria |
| Order II. Hydrogenophilales |
| Order III. Methylophilales |
| Order V. Nitrosomonadales |
| Class I. Alphaproteobacteria |
| Order I. Rhodospirillales |
| Order III. Rhodobacterales |
| Order IV. Sphingomonadales |
| Bergey's Manual® of Systematic Bacteriology |
| David Henricks Bergey 1860-1937 |
| Class I. Alphaproteobacteria |
| Order III. Rhodobacterales |
| Family I. Rhodobacteraceae |
| Genus VIII. Ketogulonicigenium |
| Genus XVI. Roseinatronobacter |
| Genus Incertae Sedis XXVI. Rhodothalassium |
| Robert Stanley Breed, 1877-1956 |
| Bergey's Manual® of Systematic Bacteriology |
| Class I. Alphaproteobacteria |
| Order I. Rhodospirillales |
| Family I. Rhodospirillaceae |
| Genus IV. Magnetospirillum |
| Genus Incertae Sedis XII. "Sporospirillum" |
| Family II. Acetobacteraceae |
| Genus VIII. Gluconacetobacter |
| Genus X. Paracraurococcus |
| Bergey's Manual® of Systematic Bacteriology |
| Class I. Alphaproteobacteria |
| Family II. Anaplasmataceae |
| Genus Incertae Sedis V. Aegyptianella |
| Family III. Holosporaceae |
| Genus Incertae Sedis II. Caedibacter |
| Genus Incertae Sedis III. Lyticum |
| Genus Incertae Sedis IV. Odyssella |
| Genus Incertae Sedis VI. Pseudocaedibacter |
| Genus Incertae Sedis VII. "Pseudolyticum" |
| Genus Incertae Sedis VIII. Tectibacter |
| Bergey's Manual® of Systematic Bacteriology |
| A, Robert Earle Buchanan, 1883-1973 |
| Class I. Alphaproteobacteria |
| Order IV. Sphingomonadales |
| Family I. Sphingomonadaceae |
| Genus III. "Citromicrobium" |
| Genus V. Erythromicrobium |
| Genus VII. Porphyrobacter |
| Genus VIII. Sandaracinobacter |
| Bergey's Manual® of Systematic Bacteriology |
| Class I. Alphaproteobacteria |
| Family VIII. Hyphomicrobiaceae |
| Genus II. Ancalomicrobium |
| Genus IV. Angulomicrobium |
| Genus IX. Dichotomicrobium |
| Genus XIII. Methylorhabdus |
| Genus XV. Prosthecomicrobium |
| Genus XVI. Rhodomicrobium |
| Bergey's Manual® of Systematic Bacteriology |
| Class I. Alphaproteobacteria |
| Family VII. Bradyrhizobiaceae |
| Genus IX. Rhodopseudomonas |
| Bergey's Manual® of Systematic Bacteriology |
| Class I. Alphaproteobacteria |
| Family IV. Phyllobacteriaceae |
| Genus VII. Pseudaminobacter |
| Bergey's Manual® of Systematic Bacteriology |
| Class I. Alphaproteobacteria |
| Order IV. Sphingomonadales |
| Family I. Sphingomonadaceae |
| Family I. Caulobacteraceae |
| Genus IV. Phenylobacterium |
| Order III. Rhodobacterales |
| Family I. Rhodobacteraceae |
| Order I. Rhodospirillales |
| Bergey's Manual® of Systematic Bacteriology |
| Class II. Betaproteobacteria |
| Family I. Burkholderiaceae |
| Genus V. Polynucleobacter |
| Family II. Oxalobacteraceae |
| Genus III. Herbaspirillum |
| Genus IV. Janthinobacterium |
| Family IV. Comamonadaceae |
| Family III. Alcaligenaceae |
| Bergey's Manual® of Systematic Bacteriology |
| Class II. Betaproteobacteria |
| Family IV. Comamonadaceae |
| Genus Incertae Sedis I. Aquabacterium |
| Genus Incertae Sedis II. Ideonella |
| Genus Incertae Sedis III. Leptothrix |
| Genus Incertae Sedis IV. Roseateles |
| Genus Incertae Sedis V. Rubrivivax |
| Genus Incertae Sedis VI. Sphaerotilus |
| Genus Incertae Sedis VII. Tepidimonas |
| Genus Incertae Sedis VIII. Thiomonas |
| Genus Incertae Sedis IX. Xylophilus |
| Bergey's Manual® of Systematic Bacteriology |
| Class II. Betaproteobacteria |
| Genus IV. Chromobacterium |
| Genus Incertae Sedis XIV. Catenococcus |
| Genus Incertae Sedis XV. Morococcus |
| Bergey's Manual® of Systematic Bacteriology |
| Class II. Betaproteobacteria |
| Genus VIII. Ferribacterium |
| Bergey's Manual® of Systematic Bacteriology |
| Class III. Gammaproteobacteria |
| Genus III. Halochromatium |
| Genus VII. Marichromatium |
| Genus VIII. Nitrosococcus |
| Genus X. Rhabdochromatium |
| Genus XI. Thermochromatium |
| Genus XII. Thioalkalicoccus |
| Genus XVII. Thioflavicoccus |
| Genus XVIII. Thiohalocapsa |
| Genus XXI. Thiorhodococcus |
| Genus XXII. Thiorhodovibrio |
| Genus XXIII. Thiospirillum |
| Bergey's Manual® of Systematic Bacteriology |
| Class III. Gammaproteobacteria |
| Order XIII. “Enterobacteriales” |
| Family I. Enterobacteriaceae |
| Genus VIII. Calymmatobacterium |
| Genus XXII. Obesumbacterium |
| Genus XXIV. Pectobacterium |
| Genus XXV. “Candidatus Phlomobacter” |
| Genus XXXII. Saccharobacter |
| Genus XXXVIII. Trabulsiella |
| Genus XXXIX. Wigglesworthia |
| Bergey's Manual® of Systematic Bacteriology |
| Class III. Gammaproteobacteria |
| Family I. Alteromonadaceae |
| Genus VIII. Marinobacterium |
| Genus XI. Pseudoalteromonas |
| Bergey's Manual® of Systematic Bacteriology |
| Class III. Gammaproteobacteria |
| Order IX. Pseudomonadales |
| Family I. Pseudomonadaceae |
| Family III. Incertae Sedis |
| Bergey's Manual® of Systematic Bacteriology |
| Class III. Gammaproteobacteria |
| Genus Incertae Sedis III. Tolumonas |
| Family II. Succinivibrionaceae |
| Genus II. Anaerobiospirillum |
| Bergey's Manual® of Systematic Bacteriology |
| Class III. Gammaproteobacteria |
| Order VIII. Oceanospirillales |
| Family I. Oceanospirillaceae |
| Genus IV. Marinospirillum |
| Family II. Alcanivoraceae |
| Family IV. Halomonadaceae |
| Genus III. Chromohalobacter |
| Bergey's Manual® of Systematic Bacteriology |
| Class III. Gammaproteobacteria |
| Family II. Piscirickettsiaceae |
| Genus III. Hydrogenovibrio |
| Genus V. Thioalkalimicrobium |
| Family III. Francisellaceae |
| Bergey's Manual® of Systematic Bacteriology |
| Class III. Gammaproteobacteria |
| Order III. Xanthomonadales |
| Family I. Xanthomonadaceae |
| Genus VI. Pseudoxanthomonas |
| Genus IX. Stenotrophomonas |
| Bergey's Manual® of Systematic Bacteriology |
| Class III. Gammaproteobacteria |
| Family II. Ectothiorhodospiraceae |
| Genus I. Ectothiorhodospira |
| Genus III. Halorhodospira |
| Genus V. Thioalkalivibrio |
| Family III. Halothiobacillaceae |
| Genus I. Halothiobacillus |
| Bergey's Manual® of Systematic Bacteriology |
| Class III. Gammaproteobacteria |
| Order VII. Methylococcales |
| Family I. Methylococcaceae |
| Genus IV. Methylomicrobium |
| Genus VII. Methylosphaera |
| Bergey's Manual® of Systematic Bacteriology |
| Class III. Gammaproteobacteria |
| Order XIV. Pasteurellales |
| Family I. Pasteurellaceae |
| Bergey's Manual® of Systematic Bacteriology |
| Class IV. Deltaproteobacteria |
| Order III. Desulfobacterales |
| Family I. Desulfobacteraceae |
| Genus II. Desulfobacterium |
| Genus VIII. Desulfofrigus |
| Family II. Desulfobulbaceae |
| Genus IV. Desulforhopalus |
| Family III. Nitrospinaceae |
| Bergey's Manual® of Systematic Bacteriology |
| Class IV. Deltaproteobacteria |
| Family II. Cystobacteraceae |
| Family III. Polyangiaceae |
| Family IV. Nannocystaceae |
| Bergey's Manual® of Systematic Bacteriology |
| Class IV. Deltaproteobacteria |
| Order II. Desulfovibrionales |
| Family I. Desulfovibrionaceae |
| Family II. Desulfomicrobiaceae |
| Genus I. Desulfomicrobium |
| Family III. Desulfohalobiaceae |
| Genus II. Desulfonatronovibrio |
| Genus III. Desulfothermus |
| Family IV. Desulfonatronumaceae |
| Bergey's Manual® of Systematic Bacteriology |
| Class IV. Deltaproteobacteria |
| Order VI. Syntrophobacterales |
| Family I. Syntrophobacteraceae |
| Genus III. Desulforhabdus |
| Genus V. Thermodesulforhabdus |
| Bergey's Manual® of Systematic Bacteriology |
| Class IV. Deltaproteobacteria |
| Family I. Desulfurellaceae |
| Order II. Desulfovibrionales |
| Order III. Desulfobacterales |
| Family I. Desulfarculaceae |
| Order V. Desulfuromonales |
| Family I. Desulfuromonaceae |
| Family II. Geobacteraceae |
| Genus II. Trichlorobacter |
| Order VI. Syntrophobacterales |
| Order VII. Bdellovibrionales |
| Family I. Bdellovibrionaceae |
| Bergey's Manual® of Systematic Bacteriology |
| Class II. Betaproteobacteria |
| Order II. Hydrogenophilales |
| Family I. Hydrogenophilaceae |
| Order III. Methylophilales |
| Family I. Methylophilaceae |
| Genus II. Methylobacillus |
| Order V. Nitrosomonadales |
| Family I. Nitrosomonadaceae |
| Genus IV. "Nitrosovibrio" |
| Family III. Gallionellaceae |
| Bergey's Manual® of Systematic Bacteriology |
| Class III. Gammaproteobacteria |
| Order II. Acidithiobacillales |
| Family I. Acidithiobacillaceae |
| Genus I. Acidithiobacillus |
| Family II. Thermithiobacillaceae |
| Genus I. Thermithiobacillus |
| Order III. Xanthomonadales |
| Family I. Xanthomonadaceae |
| Order IV. Cardiobacteriales |
| Family I. Cardiobacteriaceae |
| Order VII. Methylococcales |
| Family I. Methylococcaceae |
| Order VIII. Oceanospirillales |
| Order IX. Pseudomonadales |
| Family I. Alteromonadaceae |
| Order XI. “Vibrionales” |
| Order XIII. “Enterobacteriales” |
| Family I. Enterobacteriaceae |
| Order XIV. Pasteurellales |
| Family I. Pasteurellaceae |
| Bergey's Manual® of Systematic Bacteriology |
| Class I. Alphaproteobacteria |
| Family V. Methylocystaceae |
| Genus Incertae Sedis IV. Methylopila |
| Family VI. Beijerinckiaceae |
| Family IX. Methylobacteriaceae |
| Genus I. Methylobacterium |
| Family VIII. Hyphomicrobiaceae |
| Family VII. Bradyrhizobiaceae |
| Family IV. Phyllobacteriaceae |
| Family II. Bartonellaceae |
| Bergey's Manual® of Systematic Bacteriology |
| Class V. Epsilonproteobacteria |
| Order I. Campylobacterales |
| Family I. Campylobacteraceae |
| Genus III. Sulfurospirillum |
| Family II. Helicobacteraceae |
| Bergey's Manual® of Systematic Bacteriology |
| |