[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020] Domain Bacteria Woese et al. 1990 Phylum "Spirochaetes" Garrity and Holt 2001 Class "Spirochaetes" Cavalier-Smith, 2002 see Class Spirochaetes Cavalier-Smith 2002 Order Spirochaetales Buchanan 1917 (Approved Lists 1980) Family Spirochaetaceae Swellengrebel 1907 (Approved Lists 1980) 1 Genus Spirochaeta Ehrenberg 1835 (Approved Lists 1980) 2 Genus Borrelia Swellengrebel 1907 (Approved Lists 1980) 3 Genus Brevinema Defosse et al. 1995 4 Genus Clevelandina Bermudes et al. 1988 5 Genus Cristispira Gross 1910 (Approved Lists 1980) 6 Genus Diplocalyx (ex Gharagozlou 1968) Bermudes et al. 1988 7 Genus Hollandina (ex To et al. 1978) Bermudes et al. 1988 8 Genus Pillotina (ex Hollande and Gharagozlou 1967) Bermudes et al. 1988 9 Genus Treponema Schaudinn 1905 (Approved Lists 1980)