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 Gomontiellales Strunecký & Mareš (2023), sedis mutabilis] see Order Gomontiellales Strunecký and Mareš 2023 [Family Chamaesiphonaceae Borzì (1878)] see Family Chamaesiphonaceae Borzì 1878 [Genus Chamaesiphonᵀ A.Braun (1864)] see Genus Chamaesiphon Braun 1864 [Form subgenus Chamaesiphon subg. Euchamaesiphon Geitler (1925)]