| Species | RefIntense Num | Refseq Num | Source |
|---|---|---|---|
| Roseovarius nubinhibens | 1 | 2 | HMP |
| Roseovarius sp. 217 | 1 | 1 | HMP |
| Roseovarius sp. TM1035 | 1 | 2 | HMP |
| Rothia aeria | 1 | 7 | MGYG |
| Rothia dentocariosa | 3 | 16 | HMP/MGYG |
| Rothia mucilaginosa | 7 | 23 | HMP/MGYG |
| Rubeoparvulum massiliense | 1 | 2 | MGYG |
| Rubneribacter badeniensis | 1 | 1 | MGYG |
| Rubrobacter xylanophilus | 1 | 3 | HMP |
| Ruegeria lacuscaerulensis | 1 | 7 | HMP |