• Borrelia afzelii Canica et al., 1994
• Borrelia anserina (Sakharoff, 1891) Bergey et al., 1925
• Borrelia baltazardi Karimi et al., 1979 accepted as Borrelia baltazardii corrig. (ex Karimi et al., 1979) Karimi et al., 1983
• Borrelia baltazardii corrig. (ex Karimi et al., 1979) Karimi et al., 1983
• Borrelia brasiliensis Davis, 1952
• Borrelia burgdorferi Johnson et al., 1984
• Borrelia caucasica (Kandelaki 1945) Davis, 1957
• Borrelia coriaceae Johnson et al., 1987
• Borrelia crocidurae (Leger 1917) Davis, 1957
• Borrelia dugesii (Mazzotti 1949) Davis, 1957
• Borrelia duttonii (Novy & Knapp 1906) Bergey et al., 1925
• Borrelia garinii Baranton et al., 1992
• Borrelia graingeri (Heisch 1953) Davis, 1957
• Borrelia harveyi (Garnham 1947) Davis, 1948
• Borrelia hermsii (Davis 1942) Steinhaus, 1946
• Borrelia hispanica (de Buen 1926) Steinhaus, 1946
• Borrelia japonica Kawabata et al., 1994
• Borrelia latyschewii (Sofiev 1941) Davis, 1948
• Borrelia lusitaniae Le Fleche et al., 1997
• Borrelia mazzottii Davis, 1956
• Borrelia miyamotoi Fukunaga et al., 1995
• Borrelia neotropicalis (Bates & St. John, 1922) Steinhaus, 1946 accepted as Borrelia venezuelensis (Brumpt 1921) Brumpt, 1922
• Borrelia parkeri (Davis 1942) Steinhaus, 1946
• Borrelia persica (Dschunkowsky 1913) Steinhaus, 1946
• Borrelia recurrentis (Lebert, 1874) Bergey et al., 1925
• Borrelia sinica Masuzawa et al., 2001
• Borrelia tanukii Fukunaga et al., 1997
• Borrelia theileri (Laveran 1903) Bergey et al., 1925
• Borrelia tillae Zumpt & Organ, 1961
• Borrelia turdi corrig. Fukunaga et al., 1997
• Borrelia turicatae (Brumpt 1933) Steinhaus, 1946
• Borrelia valaisiana Wang et al., 1997
• Borrelia venezuelensis (Brumpt 1921) Brumpt, 1922
• Clevelandina reticulitermitidis Bermudes et al., 1988
• Cristispira pectinis Gross, 1910
• Diplocalyx calotermitidis (ex Gharagozlou 1968) Bermudes et al., 1988
• Diplocalyx calotermitidis Gharagozlou, 1968 accepted as Diplocalyx calotermitidis (ex Gharagozlou 1968) Bermudes et al., 1988
• Hollandina pterotermitidis (ex To et al. 1978) Bermudes et al., 1988
• Hollandina pterotermitidis To et al., 1978 accepted as Hollandina pterotermitidis (ex To et al. 1978) Bermudes et al., 1988
• Microspironema pallidum (Schaudinn & Hoffmann, 1905) Stiles & Pfender, 1905 accepted as Treponema pallidum (Schaudinn & Hoffmann 1905) Schaudinn, 1905
• Pillotina calotermitidis (ex Hollande & Gharagozlou 1967) Bermudes et al., 1988
• Pillotina calotermitidis Hollande & Gharagozlou, 1967 accepted as Pillotina calotermitidis (ex Hollande & Gharagozlou 1967) Bermudes et al., 1988
• Spirochaeta africana Zhilina et al., 1996
• Spirochaeta alkalica Zhilina et al., 1996
• Spirochaeta ambigua Séguin & Vinzent, 1936 accepted as Treponema denticola (ex Flügge, 1886) Chan et al., 1993
• Spirochaeta americana Hoover et al., 2003
• Spirochaeta anserina Sakharoff, 1891 accepted as Borrelia anserina (Sakharoff, 1891) Bergey et al., 1925
• Spirochaeta asiatica Zhilina et al., 1996
• Spirochaeta aurantia (ex Vinzent 1926) Canale-Parola, 1980
• Spirochaeta aurantia Vinzent, 1926 accepted as Spirochaeta aurantia (ex Vinzent 1926) Canale-Parola, 1980
• Spirochaeta bajacaliforniensis Fracek & Stolz, 2004
• Spirochaeta biflexa Wolbach & Binger, 1914 accepted as Leptospira biflexa (Wolbach & Binger 1914) Noguchi, 1918
• Spirochaeta caldaria Pohlschroeder et al., 1995
• Spirochaeta caucasica Kandelaki, 1945 accepted as Borrelia caucasica (Kandelaki 1945) Davis, 1957
• Spirochaeta comandonii Séguin & Vinzent, 1936 accepted as Treponema denticola (ex Flügge, 1886) Chan et al., 1993
• Spirochaeta crocidurae Leger, 1917 accepted as Borrelia crocidurae (Leger 1917) Davis, 1957
• Spirochaeta cuniculi Levaditi, Marie & Isaicu, 1921 accepted as Treponema paraluiscuniculi corrig. (Jacobsthal, 1920) Smibert, 1974
• Spirochaeta cytophaga Hutchinson & Clayton, 1919 accepted as Sporocytophaga myxococcoides (Krzemieniewska 1933) Stanier, 1940
• Spirochaeta dentium (Miller, 1889) Migula, 1895 accepted as Treponema denticola (ex Flügge, 1886) Chan et al., 1993
• Spirochaeta dugesi Mazzotti, 1949 accepted as Borrelia dugesii (Mazzotti 1949) Davis, 1957
• Spirochaeta duttoni (Novy & Knapp, 1906) Breinl, 1906 accepted as Borrelia duttonii (Novy & Knapp 1906) Bergey et al., 1925
• Spirochaeta graingeri Heisch, 1953 accepted as Borrelia graingeri (Heisch 1953) Davis, 1957
• Spirochaeta halophila Greenberg & Canale-Parola, 1977
• Spirochaeta harveyi Garnham, 1947 accepted as Borrelia harveyi (Garnham 1947) Davis, 1948
• Spirochaeta hermsi Davis, 1942 accepted as Borrelia hermsii (Davis 1942) Steinhaus, 1946
• Spirochaeta hispanica de Buen, 1926 accepted as Borrelia hispanica (de Buen 1926) Steinhaus, 1946
• Spirochaeta icterogenes Uhlenhuth & Fromme, 1916 accepted as Leptospira interrogans (Stimson 1907) Wenyon, 1926
• Spirochaeta icterohaemorrhagiae Inada et al., 1916 accepted as Leptospira interrogans (Stimson 1907) Wenyon, 1926
• Spirochaeta interrogans Stimson, 1907 accepted as Leptospira interrogans (Stimson 1907) Wenyon, 1926
• Spirochaeta isovalerica Harwood & Canale-Parola, 1983
• Spirochaeta latyschewi Sofiev, 1941 accepted as Borrelia latyschewii (Sofiev 1941) Davis, 1948
• Spirochaeta litoralis (ex Hespell & Canale-Parola 1970) Canale-Parola, 1980
• Spirochaeta litoralis Hespell & Canale-Parola, 1970 accepted as Spirochaeta litoralis (ex Hespell & Canale-Parola 1970) Canale-Parola, 1980
• Spirochaeta microdentium (Noguchi, 1912) Heim, 1922 accepted as Treponema denticola (ex Flügge, 1886) Chan et al., 1993
• Spirochaeta neotropicalis Bates & St. John, 1922 accepted as Borrelia venezuelensis (Brumpt 1921) Brumpt, 1922
• Spirochaeta nodosa Hubener & Reiter, 1916 accepted as Leptospira interrogans (Stimson 1907) Wenyon, 1926
• Spirochaeta orthodonta Hoffmann, 1920 accepted as Treponema denticola (ex Flügge, 1886) Chan et al., 1993
• Spirochaeta pallida Schaudinn & Hoffmann, 1905 accepted as Treponema pallidum (Schaudinn & Hoffmann 1905) Schaudinn, 1905
• Spirochaeta paraluis Pettit, 1928 accepted as Treponema paraluiscuniculi corrig. (Jacobsthal, 1920) Smibert, 1974
• Spirochaeta paraluis-cuniculi Jacobsthal, 1920 accepted as Treponema paraluiscuniculi corrig. (Jacobsthal, 1920) Smibert, 1974
• Spirochaeta parkeri Davis, 1942 accepted as Borrelia parkeri (Davis 1942) Steinhaus, 1946
• Spirochaeta pectinis (Gross, 1910) Bosanquet, 1911 accepted as Cristispira pectinis Gross, 1910
• Spirochaeta persica Dschunkowsky, 1913 accepted as Borrelia persica (Dschunkowsky 1913) Steinhaus, 1946
• Spirochaeta pertenuis Castellani, 1905 accepted as Treponema pertenue (Castellani 1905) Castellani & Chalmers, 1910
• Spirochaeta plicatilis Ehrenberg, 1835
• Spirochaeta smaragdinae Magot et al., 1998
• Spirochaeta stenostrepta Zuelzer, 1912
• Spirochaeta theileri Laveran, 1903 accepted as Borrelia theileri (Laveran 1903) Bergey et al., 1925
• Spirochaeta thermophila Aksenova et al., 1992
• Spirochaeta turicatae Brumpt, 1933 accepted as Borrelia turicatae (Brumpt 1933) Steinhaus, 1946
• Spirochaeta zuelzerae (ex Veldkamp 1960) Canale-Parola, 1980
• Spirochaeta zuelzerae (Veldkamp, 1960) Canale-Parola, Udris & Mandel, 1968 accepted as Spirochaeta zuelzerae (ex Veldkamp 1960) Canale-Parola, 1980
• Spirochaete denticola Flügge, 1886 accepted as Treponema denticola (ex Flügge, 1886) Chan et al., 1993
• Spirochaete dentium Miller, 1889 accepted as Treponema denticola (ex Flügge, 1886) Chan et al., 1993
• Spirochaete gallinarum Stephens & Christopher, 1904 accepted as Borrelia anserina (Sakharoff, 1891) Bergey et al., 1925
• Spirochaete obermeieri Cohn, 1875 accepted as Borrelia recurrentis (Lebert, 1874) Bergey et al., 1925
• Spirochaete pertenuis (Castellani, 1905) Lehman & Neumann, 1912 accepted as Treponema pertenue (Castellani 1905) Castellani & Chalmers, 1910
• Spirochaete recurrentis Lebert, 1874 accepted as Borrelia recurrentis (Lebert, 1874) Bergey et al., 1925
• Spironema dentium (Miller, 1889) Gross, 1912 accepted as Treponema denticola (ex Flügge, 1886) Chan et al., 1993
• Spironema pallidum (Schaudinn & Hoffmann, 1905) Vuillemin, 1905 accepted as Treponema pallidum (Schaudinn & Hoffmann 1905) Schaudinn, 1905