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
         Order Acidaminococcales Campbell et al. 2015 [monotypic]
           Family Acidaminococcaceae Marchandin et al. 2010
             1 Genus Acidaminococcus Rogosa 1969 (Approved Lists 1980)
             2 Genus Phascolarctobacterium Del Dot et al. 1994
             3 Genus Succiniclasticum van Gylswyk 1995
             4 Genus Succinispira Janssen and O'Farrell 1999