prokaryotes - bacteria see Domain Bacteria Woese et al. 1990 stat. inval.
   Domain "Bacteria" Woese et al. 1990 stat. inval. see Domain Bacteria Woese et al. 2024
     Phylum "Firmicutes" (Gibbons and Murray 1978) Garrity and Holt 2001 stat. inval. see Phylum Bacillota Gibbons and Murray 2021
       1 Class Bacilli Ludwig et al. 2010
       2 Class Clostridia Rainey 2010
       3 Class Erysipelotrichia Ludwig et al. 2010 [monotypic]
       4 Class Limnochordia Watanabe et al. 2015 [monotypic]
       5 Class Negativicutes Marchandin et al. 2010
       6 Class Thermolithobacteria Sokolova et al. 2007 [monotypic]
       7 Class Tissierellia Alauzet et al. 2014 nom. inval. [monotypic] see Class Clostridia Rainey 2010