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 Mycoplasmatota Murray 2021 [monotypic]
                 Class Mollicutes Edward and Freundt 1967 (Approved Lists 1980)
                   Order Mycoplasmoidales Gupta et al. 2018
                     Family Mycoplasmoidaceae Gupta et al. 2018
                       Genus Ureaplasma Shepard et al. 1974 (Approved Lists 1980)
                         1 Ureaplasma canigenitalium Harasawa et al. 1993
                         2 Ureaplasma cati Harasawa et al. 1990
                         3 Ureaplasma diversum Howard and Gourlay 1982
                         4 Ureaplasma felinum Harasawa et al. 1990
                         5 Ureaplasma gallorale Koshimizu et al. 1987
                         6 Ureaplasma parvum Robertson et al. 2002
                         7 Ureaplasma urealyticumᵀ Shepard et al. 1974 (Approved Lists 1980)