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 Nostocales corrig. Borzì 1914 Family Hapalosiphonaceae Elenkin 1917 01 Genus Albrightia Copeland 1936 02 Genus Baradlaia Palik 1960 03 Genus Brachytrichiopsis Jao 1944 04 Genus Chondrogloea Schmidle 1901 05 Genus Fischerella (Bornet and Flahault 1886) Gomont 1895 06 Genus Geitleria Friedmann 1955 07 Genus Handeliella Skuja 1937 08 Genus Hapalosiphonᵀ Nägeli ex Bornet and Flahault 1886 09 Genus Hyphomorpha Borzì 1916 10 Genus Leptopogon Borzì 1907 11 Genus Letestuinema Frémy 1930 12 Genus Lithonema Ercegović 1929 13 Genus Loefgrenia Gomont 1896 14 Genus Loriella Borzì 1892 15 Genus Mastigocladus Cohn ex Kirchner 1898 16 Genus Mastigocoleopsis Geitler 1925 17 Genus Mastigocoleus Lagerheim ex Bornet and Flahault 1886 18 Genus Matteia Borzì 1907 19 Genus Neowestiellopsis Kabirnataj et al. 2018 20 Genus Nostochopsis Wood ex Bornet and Flahault 1886 21 Genus Parthasarathiella Suba Raju 1962 22 Genus Pelatocladus Johansen and Vaccarino 2016 23 Genus Phayaothrix Tawong et al. 2024 24 Genus Reptodigitus Casamatta et al. 2020 25 Genus Spelaeopogon Borzì 1907 26 Genus Thalpophila Borzì 1907 27 Genus Westiella Borzì 1907 28 Genus Westiellopsis Janet 1941