living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Prokaryotae see Superkingdom Prokarya
     Kingdom Monera Haeckel 1866 see Domain Bacteria Woese et al. 1990
       Division Bacteria (Haeckel 1894) see Domain Bacteria Woese et al. 1990
         "Spirochetes" see Phylum Spirochaetes Garrity and Holt 2001
           Order Spirochaetales Buchanan 1917 (Approved Lists 1980)
             Family Spirochaetaceae Swellengrebel 1907 (Approved Lists 1980)
               1 Genus Spirochaeta Ehrenberg 1835 (Approved Lists 1980)
               2 Genus Cristispira Gross 1910 (Approved Lists 1980)
               3 Genus Treponema Schaudinn 1905 (Approved Lists 1980)
               4 Genus Borrelia Swellengrebel 1907 (Approved Lists 1980)
               5 Genus Leptospira Noguchi 1917 (Approved Lists 1980)