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 stat. inval.
     Phylum "fermenting bacteria" see Phylum Firmicutes (Gibbons and Murray 1978) Garrity and Holt 2001 stat. inval.
       1 Genus Diplococcus Weichselbaum 1886 nom. inval.
       1 Genus Ruminobacter (ex Sijpesteijn 1949) Stackebrandt and Hippe 1987
       2 ?Genus Eubacterium Prévot 1938 (Approved Lists 1980)
       3 ?Genus Bacteroides Castellani and Chalmers 1919 (Approved Lists 1980)
       4 ?Genus Fusobacterium Knorr 1922 (Approved Lists 1980)
       5 ?Genus Leptotrichia Trevisan 1879 (Approved Lists 1980) nom. cons.
       6 Class "Gram-Negative Cocci" see Family Acidaminococcaceae "Garrity and Holt 2001" nom. nud.
       7 Class "Lactic-Acid Bacteria" see Order Lactobacillales "Garrity and Holt 2001" nom. nud.
       8 Class "Clostridia" "Garrity and Holt 2001" nom. nud. see Class Clostridia Rainey 2010
       9 Class "Peptococcaceae" see Family Peptococcaceae Rogosa 1971 (Approved Lists 1980)