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 Cyanobacteriota Oren et al. 2022
                 Class Chroococcophyceaeᵀ Hollerbach et al. 1953
                   Order †Sarmaellales Vologdin 1962
                     Family †Plexostromataceae Vologdin 1962
                       1 Genus †Cyanostroma Vologdin 1962
                       2 Genus †Nerusiandella Vologdin 1962
                       3 Genus †Papulophycus Vologdin 1962
                       4 Genus †Plexostromaᵀ Vologdin 1962
                       5 Genus †Ramulostroma Vologdin 1962
                       6 Genus †Vittophyton Vologdin 1962