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 Actinomycetota Goodfellow 2021
                 Class Coriobacteriia König 2013
                   Order Coriobacterialesᵀ Stackebrandt et al. 1997
                     Family Atopobiaceae Gupta et al. 2013
                       Genus Olsenella Dewhirst et al. 2001
                         1 Olsenella profusa Dewhirst et al. 2001
                         2 Olsenella uli (Olsen et al. 1991) Dewhirst et al. 2001
                         3 Olsenella umbonata Kraatz et al. 2011