procaryotes
   Domain Bacteria Woese et al. 1990 stat. inval. see Domain Bacteria Woese et al. 2024
     Phylum Nitrospirae Garrity and Holt 2001 nom. inval. see Phylum Nitrospirota Garrity and Holt 2021
       Class "Nitrospira" "Garrity and Holt 2001" nom. nud. see Class Nitrospiria Garrity and Holt 2022
         Order "Nitrospirales" "Garrity and Holt 2001" nom. nud. see Order Nitrospirales Garrity and Holt 2022
           Family "Nitrospiraceae" "Garrity and Holt 2001" nom. nud. see Family Nitrospiraceae Garrity and Holt 2022
             Genus Leptospirillum (ex Markosyan 1972) Hippe 2000