prokaryotes - bacteria see Domain Bacteria Woese et al. 1990
   Domain "Bacteria" Woese et al. 1990
     Phylum "Firmicutes" corrig. Gibbons and Murray 1978 (Approved Lists 1980)
       Class Negativicutes Marchandin et al. 2010
         Order Selenomonadales Marchandin et al. 2010
           1 Family Selenomonadaceae Campbell et al. 2015
           2 Family Sporomusaceae Campbell et al. 2015