Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 2024
             Kingdom Bacillatiᵀ (Gibbons and Murray 1978) Oren and Göker 2024
               Phylum Bacillotaᵀ Gibbons and Murray 2021
                 Class Negativicutes Marchandin et al. 2010
                   Order Selenomonadales Marchandin et al. 2010
                     Family Selenomonadaceaeᵀ Campbell et al. 2015
                       1 Genus Anaerovibrio Hungate 1966 (Approved Lists 1980) [monotypic]
                       2 Genus Centipeda Lai et al. 1983 [monotypic]
                       3 Genus Megamonas Shah and Collins 1983
                       4 Genus Mitsuokella Shah and Collins 1983
                       5 Genus Pectinatus Lee et al. 1978 (Approved Lists 1980)
                       6 Genus Propionispira Schink et al. 1983 [monotypic]
                       7 Genus Schwartzia van Gylswyk et al. 1997 [monotypic]
                       8 Genus Selenomonasᵀ von Prowazek 1913 (Approved Lists 1980) nom. cons.