Table 1.
List of genera comprising rhizobial species with valid names standing in nomenclature (LPSN) in October 2021. The number of valid names does not include synonyms.
| α-Proteobacteria | ||
| Hyphomicrobiales (=Rhizobiales) | ||
| Rhizobiaceae | ||
|
| ||
| Agrobacterium | 11 valid names | 2 rhizobia |
| Allorhizobium | 8 valid names | 2 rhizobia |
| Ensifer (=Sinorhizobium) | 20 valid names | 20 rhizobia |
| Neorhizobium | 5 valid names | 4 rhizobia |
| Pararhizobium | 6 valid names | 2 rhizobia |
| Rhizobium | 92 valid names | 49 rhizobia |
| Shinella | 8 valid names | 1 rhizobia |
|
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| Phyllobacteriaceae | ||
|
| ||
| Aminobacter | 7 valid names | 1 rhizobia |
| Phyllobacterium | 12 valid names | 4 rhizobia |
| Mesorhizobium | 59 valid names | 48 rhizobia |
|
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| Nitrobacteraceae (=Bradyrhizobiaceae) | ||
|
| ||
| Bradyrhizobium | 63 valid names | 58 rhizobia |
|
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| Methylobacteriaceae | ||
|
| ||
| Microvirga | 18 valid names | 4 rhizobia |
| Methylobacterium | 47 valid names | 1 rhizobia |
|
| ||
| Brucellaceae | ||
|
| ||
| Brucella (=Ochrobactrum) | 25 valid names | 2 rhizobia |
|
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| Hyphomicrobiaceae | ||
|
| ||
| Devosia | 26 valid names | 1 rhizobia |
|
| ||
| Xanthobacteraceae | ||
|
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| Azorhizobium | 3 valid names | 2 rhizobia |
|
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| β-Proteobacteria | ||
| Burkholderiales | ||
| Burkholderiaceae | ||
|
| ||
| Cupriavidus | 18 valid names | 2 rhizobia |
| Paraburkholderia | 79 valid names | 22 rhizobia |
| Trinickia | 7 valid names | 1 rhizobia |