prokaryotes - bacteria see Domain Bacteria Woese et al. 1990
   Domain "Bacteria" Woese et al. 1990
     Phylum "Firmicutes" corrig. Gibbons and Murray 1978 (Approved Lists 1980)
       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