Domain Bacteria Woese et al. 1990
Count: [*] *
   Phylum Proteobacteria Garrity and Holt 2001 see Phylum Proteobacteria Garrity et al. 2005
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     Class "Betaproteobacteria" Garrity et al. 2001 nom. ined. see Class Betaproteobacteria Garrity et al. 2006
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       Order "Nitrosomonadales" see Order Nitrosomonadales Garrity et al. 2006
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         Family "Nitrosomonadaceae" see Family Nitrosomonadaceae Garrity et al. 2006
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           Genus Nitrosospira Winogradsky and Winogradsky 1933 (Approved Lists 1980)
          Count: -