organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Kingdom Monera Haeckel 1866 see Domain Bacteria Woese et al. 1990
     Phylum Spirochaetae (Ehrenberg 1855) Cavalier-Smith 1998 see Phylum Spirochaetes Garrity and Holt 2001
       1 Genus Cristispira Gross 1910 (Approved Lists 1980)
       1 Genus Leptonema Hovind-Hougen 1983
       1 Genus Leptospira Noguchi 1917 (Approved Lists 1980)
       2 "Leptospires" see Family Leptospiraceae Hovind-Hougen 1979 (Approved Lists 1980)
       3 "Spirochaetales" Buchanan, 1917 see Order Spirochaetales Buchanan 1917 (Approved Lists 1980)
       4 "Cristispires" see Family Spirochaetaceae Swellengrebel 1907 (Approved Lists 1980)