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 Planctomycetes-Verrucomicrobia-Chlamydiae (PVC) Wagner and Horn 2006
               Phylum "Planctomycetes" Garrity and Holt 2001
                 Class Phycisphaerae Fukunaga et al. 2010 [monotypic]
                   Order Phycisphaeralesᵀ Fukunaga et al. 2010 [monotypic]
                     Family Phycisphaeraceaeᵀ Fukunaga et al. 2010
                       Genus Algisphaera Yoon et al. 2014 [monotypic]
                         1 Algisphaera agarilyticaᵀ Yoon et al. 2014