Spirochaetales Buchanan 1917 (Approved Lists 1980) emend. Hördt et al. 2020 Spirochaeta Ehrenberg 1835 (Approved Lists 1980) emend. Shivani et al. 2015 Universal Root Woese et al. 1990 Bacteria (None 2015) Woese et al. 1990 Spirochaetota corrig. Garrity and Holt 2021 Spirochaetes (sic) Garrity and Holt 2021 non Spirochaetes Cavalier-Smith 2002 Spirochaetia (Cavalier-Smith 2002) Paster 2020 Spirochaetales Buchanan 1917 (Approved Lists 1980) emend. Hördt et al. 2020 Spirochaetia (Cavalier-Smith 2002) Paster 2020 Brevinematales Gupta et al. 2014 Leptospiriales Gupta et al. 2014 Brachyspiriales (sic) Gupta et al. 2014 Brachyspirales corrig. Gupta et al. 2014 Incertae sedis 245 Pelletier et al. 2008 Incertae sedis 31 None 2015 Spirochaetaceae Swellengrebel 1907 (Approved Lists 1980) emend. Hördt et al. 2020 Borreliaceae Gupta et al. 2014 Treponemataceae Robinson 1948 (Approved Lists 1980) emend. 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