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 Nostocaceaeᵀ Eichler 1886 01 Genus †Anabaenidium Schopf 1968 02 Genus †Archaeoellipsoides Horodyski and Donaldson 1980 03 Genus †Spongophycus Korde 1954 04 Genus †Veteronostocale Schopf and Blacic 1971 05 Genus Belmontia Archibald 1967 nom. illeg. 06 Genus Calochaete Hauer et al. 2013 07 Genus Camptylonemopsis Desikachary 1948 08 Genus Compactonostoc Cai and Li 2019 09 Genus Constrictifilum Chavadar et al. 2021 10 Genus Desmonostoc Hrouzek and Ventura 2013 11 Genus Echeverriopsis Kufferath 1929 12 Genus Heterocyanococcus Kufferath 1929 13 Genus Isocystis Borzì ex Bornet and Flahault 1886 14 Genus Komarekiella Hentschke et al. 2017 15 Genus Limnanthe Kützing ex Forti 1907 16 Genus Mojavia Řeháková and Johansen 2007 17 Genus Nematonostoc Nylander ex Elenkin 1931 18 Genus Nostocᵀ Vaucher ex Bornet and Flahault 1886 19 Genus Parakomarekiella Soares et al. 2020 20 Genus Richelia Schmidt 1901 21 Genus Roholtiella Bohunická et al. 2015 22 Genus Sinonostocopsis Molinari and Guiry 2021 23 Genus Spermosira Kützing ex Frank 1886 24 Genus Sphaeronostoc Elenkin 1931 25 Genus Sphaerozyga Agardh ex Frank 1886 26 Genus Thiochaete Welsh 1961 27 Genus Violetonostoc Cai and Li 2020