Brachyspiriales (sic) Gupta et al. 2014 Brachyspirales corrig. Gupta et al. 2014 Brachyspira Hovind-Hougen et al. 1983 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 Brachyspiriales (sic) Gupta et al. 2014 Brachyspirales corrig. Gupta et al. 2014 Spirochaetia (Cavalier-Smith 2002) Paster 2020 Brevinematales Gupta et al. 2014 Leptospiriales Gupta et al. 2014 Spirochaetales Buchanan 1917 (Approved Lists 1980) emend. Hördt et al. 2020 Incertae sedis 245 Pelletier et al. 2008 Brachyspiraceae Paster 2012 Paster B.J. Krieg N.R. Staley J.T. Brown D.R. Hedlund B.P. Paster B.J. Ward N.L. Ludwig W. Whitman W.B. Family II. Brachyspiraceae 2010 4 2 531 Bergey's Manual of Systematic Bacteriology Springer New York 0387950427 Paster B.J. Krieg N.R. Staley J.T. Brown D.R. Hedlund B.P. Paster B.J. Ward N.L. Ludwig W. Whitman W.B. Class I. Spirochaetia class. nov. 2010 4 2 471 Bergey's Manual of Systematic Bacteriology Springer New York 0387950427