organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Kingdom Monera Haeckel 1866 see Domain Bacteria Woese et al. 1990
     Phylum "fermenting bacteria" see Phylum Firmicutes corrig. Gibbons and Murray 1978 (Approved Lists 1980)
       Class "Peptococcaceae" see Family Peptococcaceae Rogosa 1971 (Approved Lists 1980)
         Genus Peptostreptococcus Kluyver and van Niel 1936 (Approved Lists 1980)