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 Hapalosiphonaceae Elenkin (1917), nom. cons.] see Family Hapalosiphonaceae Elenkin 1917 ?[Genus Hapalosiphonᵀ C. Nägeli ex Bornet & Flahault (1886)] see Genus Hapalosiphon Nägeli ex Bornet and Flahault 1886 Hapalosiphon fontinalis (C.A. Agardh) ex Bornet 1889 Hapalosiphon hibernicus W. and G.S. West 1896 Hapalosiphon intricatus W. and G.S. West 1894