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. 1990 [paraphyletic?]
             Superphylum Terrabacteria Battistuzzi et al. 2004
               Phylum Firmicutes corrig. Gibbons and Murray 1978 (Approved Lists 1980)
                 Class Mollicutes Edward and Freundt 1967 (Approved Lists 1980)
                   Order Mycoplasmatales Freundt 1955 (Approved Lists 1980) [monotypic]
                     Family Mycoplasmataceae Freundt 1955 (Approved Lists 1980)
                       Genus Eperythrozoon Schilling 1928 (Approved Lists 1980) [monotypic]
                         Eperythrozoon parvum Splitter 1950 (Approved Lists 1980)