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 Nostocales Borzì (1914)] see Order Nostocales corrig. Borzì 1914 [Family Nostocaceaeᵀ Eichler (1886)] see Family Nostocaceae Eichler 1886 [Subfamily Anabaenoideae O. Kirchner (1900)] see Family Nostocaceae Eichler (1886) [Genus "Hormothamnium" orth. inval.] see Genus Hormothamnion A. Grunow ex Bornet & Flahault (1886)