[living organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
Status: extant
   Superkingdom Prokaryota
  Status: extant
     Kingdom Bacteria Cavalier-Smith 2002 - bacteria see Domain Bacteria Woese et al. 1990
    Status: extant
       Subkingdom Negibacteria Cavalier-Smith 2002 - negibacteria see Domain Bacteria Woese et al. 1990
      Status: extant
         Phylum Proteobacteria Garrity et al. 2005 see Superphylum Proteobacteria Craig et al. 2010
        Status: extant
           Class Alphaproteobacteria Garrity et al. 2006
          Status: extant
             01 Genus Breoghania Gallego et al. 2011
            Status: extant
             02 Order Caulobacterales Henrici and Johnson 1935 (Approved Lists 1980)
            Status: extant
             03 Order Kiloniellales Wiese et al. 2009
            Status: extant
             04 Order Kordiimonadales Kwon et al. 2005
            Status: extant
             05 Order Magnetococcales Bazylinski et al. 2013
            Status: extant
             06 Order "Parvularculales"
            Status: extant
             07 Order Rhizobiales Kuykendall 2006
            Status: extant
             08 Order Rhodobacterales Garrity et al. 2006
            Status: extant
             09 Order Rhodospirillales Pfennig and Trüper 1971 (Approved Lists 1980)
            Status: extant
             10 Order Rickettsiales Gieszczykiewicz 1939 (Approved Lists 1980)
            Status: extant
             11 Order Sneathiellales Kurahashi et al. 2008
            Status: extant
             12 Order Sphingomonadales Yabuuchi and Kosako 2006
            Status: extant