Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 1990 [paraphyletic?]
             Superphylum Terrabacteria Battistuzzi et al. 2004
               Phylum Firmicutes corrig. Gibbons and Murray 1978 (Approved Lists 1980)
                 Class Clostridia Rainey 2010
                   Order Clostridialesᵀ Prévot 1953 (Approved Lists 1980)
                     Family Peptococcaceae Rogosa 1971 (Approved Lists 1980)
                       01 Genus Peptococcusᵀ Kluyver and van Niel 1936 (Approved Lists 1980) [monotypic]
                       02 Genus Dehalobacter Holliger et al. 1998 [monotypic]
                       03 Genus Desulfitibacter Nielsen et al. 2006 [monotypic]
                       04 Genus Desulfitispora Sorokin and Muyzer 2010 [monotypic]
                       05 Genus Desulfitobacterium Utkin et al. 1994
                       06 Genus Desulfonispora Denger et al. 1999 [monotypic]
                       07.1 Genus Desulfotomaculum Campbell and Postgate 1965 (Approved Lists 1980)
                       07.2 Genus Desulfosporosinus Stackebrandt et al. 1997
                       08 Genus Desulfurispora Kaksonen et al. 2007 [monotypic]
                       09 Genus Pelotomaculum Imachi et al. 2002
                       10 Genus Syntrophobotulus Friedrich et al. 1996 [monotypic]
                       11 Genus Cryptanaerobacter Juteau et al. 2005 [monotypic]
                       12 Genus Thermincola Sokolova et al. 2005
                       13 Genus Sporotomaculum Brauman et al. 1998