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 Bacteroidiaᵀ Krieg 2012 [monotypic]
                   Order Bacteroidalesᵀ Krieg 2012
                     Family Rikenellaceae Krieg et al. 2012
                       Genus Acetobacteroides Su et al. 2014
                       1 Genus Rikenellaᵀ Collins et al. 1985 [monotypic]
                       2.1 Genus Alistipes Rautio et al. 2003
                       2.2 Genus Mucinivorans Nelson et al. 2015 [monotypic]
                       3 Genus Anaerocella Abe et al. 2013 [monotypic]