Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 1990 [paraphyletic?]
             Superphylum Terrabacteria Battistuzzi et al. 2004
               Phylum Firmicutes corrig. Gibbons and Murray 1978 (Approved Lists 1980)
                 Class Bacilli Ludwig et al. 2010
                   Order Bacillalesᵀ Prévot 1953 (Approved Lists 1980)
                     Family Pasteuriaceae Laurent 1890 (Approved Lists 1980) [monotypic]
                       Genus Pasteuriaᵀ Metchnikoff 1888 (Approved Lists 1980)
                         1 Pasteuria nishizawae Sayre et al. 1992
                         2 Pasteuria penetrans (ex Thorne 1940) Sayre and Starr 1986
                         3 Pasteuria ramosaᵀ Metchnikoff 1888 (Approved Lists 1980)
                         4 Pasteuria thornei Starr and Sayre 1988
                         5 Candidatus "Pasteuria aldrichii" Giblin-Davis et al. 2011
                         6 Candidatus "Pasteuria usgae" Giblin-Davis et al. 2003