life see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Empire Prokaryota (Dougherty 1957) Allsopp 1969 [monotypic] see Domain Bacteria Woese et al. 1990 stat. inval.
     Kingdom Bacteria Cavalier-Smith 1998 nom. inval. [paraphyletic] - bacteria see Kingdom Bacteria Cavalier-Smith 2002 stat. inval.
       Subkingdom Unibacteria Cavalier-Smith 1998 [paraphyletic?] see Subkingdom Unibacteria Cavalier-Smith 2002
         Infrakingdom Posibacteria (Cavalier-Smith 1987) Cavalier-Smith 1998 [monotypic] see Domain Bacteria Woese et al. 1990 stat. inval.
           Phylum Posibacteria Cavalier-Smith 1987 [paraphyletic?] see Phylum Posibacteria Cavalier-Smith 1987 ex Cavalier-Smith 2002
             Subphylum Teichobacteria Cavalier-Smith 1998 see Domain Bacteria Woese et al. 1990 stat. inval.
               Infraphylum Endobacteria T. Cavalier-Smith 1998 see Phylum Firmicutes (Gibbons and Murray 1978) Garrity and Holt 2001 stat. inval.
                 Class Clostridea Cavalier-Smith 1982 see Class Clostridia "Garrity and Holt 2001" nom. nud.
                   1 Genus Bacillus Cohn 1872 (Approved Lists 1980)