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
             [Class Schizomycetes Nägeli 1857 (Approved Lists 1980) nom. illeg., nom. rej.]
               [Order "Chlamydobacteriales" Buchanan 1917 nom. inval.]
                 [Family "Pontotrichaceae" corrig. Peshkoff 1940 nom. inval.] see Family Leucotrichaceae Buchanan 1957 (Approved Lists 1980)
                   1 [Genus "Pontothrix"ᵀ Nadson and Krassilnikov 1932 nom. inval.] see Genus Leucothrix Örsted 1844 (Approved Lists 1980)