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 Fibrobacteres-Chlorobi-Bacteroidetes (FCB) Gupta 2004
               Phylum Bacteroidetes Krieg et al. 2012
                 Class Sphingobacteriia Kämpfer 2012 [monotypic]
                   Order Sphingobacterialesᵀ Kämpfer 2012
                     Family Saprospiraceae Krieg et al. 2012
                       .1 Genus Aureispira Hosoya et al. 2006
                       .2 Genus Phaeodactylibacter Chen et al. 2014 [monotypic]
                       .3 Genus Portibacter Yoon et al. 2014 [monotypic]
                       1 Genus Saprospiraᵀ Gross 1911 (Approved Lists 1980) [monotypic]
                       2.1 Genus Lewinella Sly et al. 1998
                       2.2.1 Candidatus "Aquirestis calciphila" Hahn and Schauer 2007
                       2.2.2 Genus Haliscomenobacter van Veen et al. 1973 (Approved Lists 1980)