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 Cyanobacteria Garcia-Pichel et al. (2020)] see Phylum Cyanobacteriota Oren et al. 2022
                 [Class Cyanophyceae Hauck (1885)] see Class Chroococcophyceae Hollerbach et al. 1953
                   [Order Chroococcales Ardissone (1887)] see Order Chroococcales corrig. Ardissone 1887
                     [Family Microcystaceae Elenkin (1933), sedis mutabilis] see Family Microcystaceae Elenkin 1933
                       ?[Genus Eucapsis F.E. Clements & H.L. Shantz (1909)] see Genus Eucapsis Clements and Shantz 1909
                         Eucapsis alpina Clements and Shantz 1909
                         Eucapsis minor (H. Skuja) A.A. Elenkin 1933
                         Eucapsis minuta Fritsch 1912
                         Eucapsis parallelepipedon (W. Schmidle) J. Komárek and F. Hindák 1989
                         Eucapsis starmachii Komárek and Hindák 1989