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 Chroococcales corrig. Ardissone 1887
                     Family Geminocystaceae Tuji et al. 2021, sedis mutabilis
                       1 Genus Annamia Nguyen 2013
                       2 Genus Cyanobacterium Rippka and Cohen-Bazire 2022
                       3 Genus Geminobacterium Ramos et al. 2017
                       4 Genus Geminocystisᵀ Korelusová et al. 2009
                       5 Genus Limnothece Zhang et al. 2024
                       6 Genus Microcrocis Richter 1892
                       7 Genus Picosynechococcus Komárek et al. 2020