prokaryotes - bacteria see Domain Bacteria Woese et al. 1990
Status: extant
   Domain "Bacteria" Woese et al. 1990
  Status: extant
     Phylum "Spirochaetes" Garrity and Holt 2001 [monotypic]
    Status: extant
       Class Spirochaetes Cavalier-Smith 2002
      Status: extant
         Order Brevinematales Gupta et al. 2014 [monotypic]
        Status: extant
           1 Family Brevinemataceae Paster 2012 [monotypic]
          Status: extant