[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)
               Leptospira santarosai Yasuda et al. 1987