[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Bacteria Woese et al. 1990
     Phylum Firmicutes corrig. Gibbons and Murray 1978 (Approved Lists 1980)
       Class "Clostridia" Garrity et al. 2001 nom. ined. see Class Clostridia Rainey 2010
         Order Clostridiales Prévot 1953 (Approved Lists 1980)
           Family Peptococcaceae Rogosa 1971 (Approved Lists 1980)
             01 Genus Peptococcus Kluyver and van Niel 1936 (Approved Lists 1980)
             02 Genus Carboxydothermus Svetlichny et al. 1991
             03 Genus Dehalobacter Holliger et al. 1998
             04 Genus Desulfitobacterium Utkin et al. 1994
             05 Genus Desulfonispora Denger et al. 1999
             06 Genus Desulfosporosinus Stackebrandt et al. 1997
             07 Genus Desulfotomaculum Campbell and Postgate 1965 (Approved Lists 1980)
             08 Genus Pelotomaculum Imachi et al. 2002
             09 Genus Syntrophobotulus Friedrich et al. 1996
             10 Genus Thermoterrabacterium Slobodkin et al. 1997 see Genus Carboxydothermus Svetlichny et al. 1991