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 "Firmicutes" (Gibbons and Murray 1978) Garrity and Holt 2001 stat. inval. see Phylum Bacillota Gibbons and Murray 2021
       Class Negativicutes Marchandin et al. 2010
         1 Order Acidaminococcales Campbell et al. 2015 [monotypic]
         2 Order Selenomonadales Marchandin et al. 2010
         3 Order Veillonellales Campbell et al. 2015 [monotypic]