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
                     01 Genus Chroobacter Pringsheim 1953, incertae sedis
                     02 Genus Pseudochroococcus Duval et al. 2021, incertae sedis
                     03 Genus Waterburya Bonthond and Shalygin 2021, incertae sedis
                     04 Genus "Candidatus Pleuronema" corrig. Couradeau et al. 2022 nom. pro-illeg., incertae sedis
                     05 Family †Lermontovaephycaceae Vologdin 1962
                     06 Family †Vesiculariaceae Vologdin 1962 nom. illeg.
                     07 Family Dermocarpaceae Geitler 1925, incertae sedis
                     08 Family Leuconemataceae Kaas 1983, incertae sedis [monotypic]
                     09 Family Skujapeltaceae Hall and Claus 1967, incertae sedis [monotypic]
                     10.1.1 Family Microcystaceae Elenkin 1933, sedis mutabilis
                     10.1.2 Family Geminocystaceae Tuji et al. 2021, sedis mutabilis
                     10.1.3 Family Gomphosphaeriaceae Elenkin 1933, sedis mutabilis
                     10.1.4 Family Hydrococcaceae Kützing 1843, sedis mutabilis
                     10.2.1 Family Chroococcaceaeᵀ Nägeli 1849
                     10.2.2 Family Entophysalidaceae Geitler 1925
                     11 Family Halothecaceae Strunecký and Mareš 2023 [monotypic]
                     12 ?Family "Stichosiphonaceae" Hoffmann et al. 2005 nom. nud. [monotypic]