Procaryotic Genera
Ref: G.M. Garrity et al., 2001b: 1; Count: [*] 25p;39c;84o;215f;1008g [28 May 2016]
   Domain "Bacteria" Woese et al. 1990
  Ref: G.M. Garrity et al., 2001b: 3; Count: [*] 23p;31c;72o;194f;935g [28 May 2016]
     Phylum Proteobacteria Garrity and Holt 2001 see Phylum Proteobacteria Garrity et al. 2005
    Ref: G.M. Garrity et al., 2001b: 6 [new taxon]; Count: [*] 5c;34o;72f;430g [27 May 2016]
       Class "Gammaproteobacteria" nom. inval. see Class Gammaproteobacteria Garrity et al. 2005
      Ref: G.M. Garrity et al., 2001b: 10 [new position]; Count: [*] 14o;22f;169g [27 May 2016]
         Order "Thiotrichales" see Order Thiotrichales Garrity et al. 2005
        Ref: G.M. Garrity et al., 2001b: 11; Count: [*] 3f;15g [27 May 2016]
           Family "Piscirickettsiaceae" see Family Piscirickettsiaceae Fryer and Lannan 2005
          Ref: G.M. Garrity et al., 2001b: 11; Count: [*] 5g [27 May 2016]
             Genus Methylophaga Janvier et al. 1985
            Ref: G.M. Garrity et al., 2001b: 11; Count: -