procaryotes
   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 "Clostridia" "Garrity and Holt 2001" nom. nud. see Class Clostridia Rainey 2010
         Order Clostridiales Prévot 1953 (Approved Lists 1980) see Order Eubacteriales Buchanan 1917 (Approved Lists 1980)
           Family Peptococcaceae Rogosa 1971 (Approved Lists 1980)
             01 Genus Peptococcus Kluyver and van Niel 1936 (Approved Lists 1980)
             02 Genus Anaeroarcus Strömpl et al. 1999
             03 Genus Anaerosinus Strömpl et al. 1999
             04 Genus Anaerovibrio Hungate 1966 (Approved Lists 1980)
             05 Genus Carboxydothermus Svetlichny et al. 1991
             06 Genus Centipeda Lai et al. 1983
             07 Genus Dehalobacter Holliger et al. 1998
             08 Genus Dendrosporobacter Strömpl et al. 2000
             09 Genus Desulfitobacterium Utkin et al. 1994
             10 Genus Desulfonispora Denger et al. 1999
             11 Genus Desulfosporosinus Stackebrandt et al. 1997
             12 Genus Desulfotomaculum Campbell and Postgate 1965 (Approved Lists 1980)
             13 Genus Mitsuokella Shah and Collins 1983
             14 Genus Propionispira Schink et al. 1983
             15 Genus Succinispira Janssen and O'Farrell 1999
             16 Genus Syntrophobotulus Friedrich et al. 1996
             17 Genus Thermoterrabacterium Slobodkin et al. 1997 see Genus Carboxydothermus Svetlichny et al. 1991