[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 Leptospiraceae Hovind-Hougen 1979 (Approved Lists 1980)
             Genus Leptospira Noguchi 1917 (Approved Lists 1980)
               01 Leptospira interrogans (Stimson 1907) Wenyon 1926 (Approved Lists 1980)
               02 Leptospira alexanderi Brenner et al. 1999
               03 Leptospira biflexa (Wolbach and Binger 1914) Noguchi 1918 (Approved Lists 1980)
               04 Leptospira borgpetersenii Yasuda et al. 1987
               05 Leptospira broomii Levett et al. 2006
               06 Leptospira fainei Perolat et al. 1998
               07 Leptospira inadai Yasuda et al. 1987
               08 Leptospira kirschneri Ramadass et al. 1992
               09 Leptospira meyeri Yasuda et al. 1987
               10 Leptospira noguchii Yasuda et al. 1987
               11 Leptospira santarosai Yasuda et al. 1987
               12 Leptospira weilii Yasuda et al. 1987
               13 Leptospira wolbachii Yasuda et al. 1987