living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Prokaryotae see Superkingdom Prokarya
     Kingdom Monera Haeckel 1866 see Domain Bacteria Woese et al. 1990
       Division Bacteria (Haeckel 1894) see Domain Bacteria Woese et al. 1990
         "Gram-negative aerobic rods and cocci"
           1 Family Pseudomonadaceae Winslow et al. 1917 (Approved Lists 1980)
           2 Family Azotobacteraceae Pribram 1933 (Approved Lists 1980) see Family Pseudomonadaceae Winslow et al. 1917 (Approved Lists 1980)
           3 Family Rhizobiaceae Conn 1938 (Approved Lists 1980)
           4 Family Methylmonadaceae see Family Methylococcaceae Whittenbury and Krieg 1984
           5 Family Halobacteriaceae Gibbons 1974 (Approved Lists 1980)