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
       "Spirochaetales" Buchanan, 1917 see Order Spirochaetales Buchanan 1917 (Approved Lists 1980)
         Genus Treponema Schaudinn 1905 (Approved Lists 1980)
           Treponema pallidum (Schaudinn and Hoffmann 1905) Schaudinn 1905 (Approved Lists 1980)