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
01 Genus †Caudiculophycus Schopf 1968, incertae sedis
02 Genus Iphianassa Panou and Gkelis 2022, incertae sedis
03 Genus Johanseniella Pal and Singh 2022, incertae sedis
04 Genus Neocylindrospermum Tawong et al. 2022, incertae sedis
05 Family †Foniniaceae Korde 1973 [monotypic]
06 Family †Zheleznayaceae Molinari and Guiry 2021 [monotypic]
07 Family Capsosiraceae Geitler 1925, incertae sedis
08 Family Rhizonemataceae Büdel and Kauff ex Lücking and Barrie 2014, incertae sedis [monotypic]
09.1.1 Family Rivulariaceae Frank 1886
09.1.2 Family Calotrichaceae corrig. Cooke 1890
09.2.1 Family Scytonemataceae corrig. Frank 1886
09.2.2.1 Family Hapalosiphonaceae Elenkin 1917
09.2.2.2 Family Chlorogloeopsidaceae Mitra and Pandey 1967 [monotypic]
10.1.1 Family Heteroscytonemataceae McGregor and Sendall 2018 [monotypic]
10.1.2 Family Stigonemataceae corrig. (Agardh ex Bornet and Flahault 1886) Borzì 1892 nom. cons.
10.2.1.1 Family Tolypotrichaceae corrig. Hauer et al. 2014
10.2.1.2 Family Borzinemataceae Geitler 1942
10.2.1.3 Family Dapisostemonaceae Hentschke et al. 2016 [monotypic]
10.2.1.4 Family Godleyaceae Hauer et al. 2014
10.2.2.1.1 Family Nostocaceaeᵀ Eichler 1886
10.2.2.1.2 Family Aphanizomenaceae corrig. Elenkin 1938
10.2.2.2 Family Nodulariaceae Elenkin 1916