Ra
, Rahnella , Ralstonia , Ramlibacter , Raoultella , Rarobacter , Rarobacteraceae , Rathayibacter
Re
, Reichenbachiella , Reinekea , Renibacterium
Rh
, Rhabdochlamydia , Rhabdochromatium , Rheinheimera , Rhizobacter , Rhizobiaceae , Rhizobiales , Rhizobium , Rhodanobacter , Rhodobaca , Rhodobacter , Rhodobacteraceae , Rhodobacterales , Rhodobiaceae , Rhodobium , Rhodoblastus , Rhodocista , Rhodococcus , Rhodocyclaceae , Rhodocyclales , Rhodocyclus , Rhodoferax , Rhodoglobus , Rhodomicrobium , Rhodopila , Rhodopirellula , Rhodoplanes , Rhodopseudomonas , Rhodospira , Rhodospirillaceae , Rhodospirillales , Rhodospirillum , Rhodothalassium , Rhodothermus , Rhodovarius , Rhodovibrio , Rhodovulum
Ri
, Rickettsia , Rickettsiaceae , Rickettsiales , Rickettsiella , Riemerella , Rikenella , Rikenellaceae
Ro
, Robiginitalea , Roseateles , Roseburia , Roseibacterium , Roseibium , Roseicyclus , Roseiflexus , Roseinatronobacter , Roseisalinus , Roseivirga , Roseivirga , Roseivivax , Roseobacter , Roseococcus , Roseomonas , Roseospira , Roseospirillum , Roseovarius , Rothia
Ru
, Rubellimicrobium , Rubrimonas , Rubritalea , Rubritepida , Rubrivivax , Rubrobacter , Rubrobacteraceae , Rubrobacterales
Ruegeria Uchino et al., 1999 emend. Martens et al., 2006 emend. Yi et al., 2007
- Ruegeria atlantica (Rüger and Höfle, 1992) Vandecandelaere et al., 2008
- Ruegeria faecimaris Oh et al., 2011
- Ruegeria halocynthiae Kim et al., 2012
- Ruegeria lacuscaerulensis (Petursdottir and Kristjansson, 1999) Yi et al., 2007 emend. Vandecandelaere et al., 2008
- Ruegeria marina Huo et al., 2011
- Ruegeria mobilis Muramatsu et al., 2007 emend. Vandecandelaere et al., 2008
- Ruegeria pomeroyi (González et al., 2003) Yi et al., 2007 emend. Vandecandelaere et al., 2008
- Ruegeria scottomollicae Vandecandelaere et al., 2008
Bacteria → Proteobacteria → Alphaproteobacteria → Rhodobacterales → Rhodobacteraceae , Rugamonas , Ruminobacter , Ruminococcus , Runella