Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 1990 [paraphyletic?]
             Phylum "Spirochaetes" Garrity and Holt 2001 [monotypic]
               Class Spirochaetesᵀ Cavalier-Smith 2002 [monotypic]
                 Order Spirochaetalesᵀ Buchanan 1917 (Approved Lists 1980), sedis mutabilis
                   Family Spirochaetaceaeᵀ Swellengrebel 1907 (Approved Lists 1980)
                     Genus Treponema Schaudinn 1905 (Approved Lists 1980)
                       Treponema socranskii Smibert et al. 1984
                         1 Treponema socranskii subsp. buccale Smibert et al. 1984
                         2 Treponema socranskii subsp. paredis Smibert et al. 1984
                         3 Treponema socranskii subsp. socranskiiᵀ Smibert et al. 1984