prokaryotes - bacteria see Domain Bacteria Woese et al. 1990 stat. inval.
   Domain "Bacteria" Woese et al. 1990 stat. inval. see Domain Bacteria Woese et al. 2024
     Phylum "Proteobacteria" Garrity et al. 2005 stat. inval. see Phylum Pseudomonadota Garrity et al. 2021
       Class Betaproteobacteria Garrity et al. 2006
         Order "Procabacteriales" (sic) Garrity et al. 2002 nom. pro-inval. [monotypic] see Order Procaibacterales corrig. Garrity et al. 2002 nom. nud.
           1 Family "Procabacteriaceae" Garrity et al. 2002 [monotypic] see Family Procaibacteraceae corrig. Garrity et al. 2002 nom. nud.