1. Genus Amorphonostoc Elenkin, 1931
2. Genus Anabaenidium J.W.Schopf, 1968 †
3. Genus Archaeoellipsoides Horodyski & Donaldson, 1980 †
4. Genus Beckspringia Licari, 1978 †
5. Genus Catella G.Ålvik, 1934
6. Genus Compactonostoc F.Cai & R.Li, 2019
7. Genus Dendronalium Alvarenga & al., 2021
8. Genus Desmonostoc P.Hrouzek & S.Ventura, 2013
9. Genus Heterocyanococcus Kufferath, 1929
10. Genus Hormothamnion Grunow, 1888
11. Genus Isocystis Borzì ex Bornet & Flahault, 1888
12. Genus Komarekiella Hentschke, J.R.Johansen & Sant'Anna, 2017
13. Genus Mojavia Reháková & J.R.Johansen, 2007
14. Genus Neocylindrospermum Tawong, Poncharoen & Saijuntha, 2022
15. Genus Nostoc Vaucher ex Bornet & Flahault, 1886
16. Genus Nostocella Gaillon, 1833
17. Genus Parakomarekiella Soares, Ramos & Portugal, 2021
18. Genus Pseudonostoc A.A.Elenkin, 1949
19. Genus Roholtiella M.Bohunická, N.Pietrasiak & J.R.Johansen, 2015
20. Genus Sinonostocopsis Molinari & Guiry, 2021 †
21. Genus Spermosira Kützing ex Frank, 1886
22. Genus Sphaerozyga C.Agardh, 1886
23. Genus Veteronostocale J.W.Schopf & Blacic, 1971 †
24. Genus Violetonostoc F.Cai & R.Li, 2020
25. Genus Anabaenothrix M.S.Randhawa, 1936 accepted as Wollea Bornet & Flahault, 1886
26. Genus Anabaina Bory, 1822 accepted as Anabaena Bory de Saint-Vincent ex Bornet & Flahault, 1886
27. Genus Coenocoleus Berkeley & Thwaites, 1848 accepted as Desmonema M.J.Berkeley & Thwaites ex Bornet & Flahault, 1887
28. Genus Limnochlide Kützing, 1843 accepted as Aphanizomenon A.Morren ex Bornet & Flahault, 1888
29. Genus Monormia Berkeley, 1833
30. Genus Nematonostoc Nylander ex Elenkin, 1931 accepted as Nostoc Vaucher ex Bornet & Flahault, 1886
31. Genus Polycoccus Kützing, 1841 accepted as Nostoc Vaucher ex Bornet & Flahault, 1886
32. Genus Purpurea F.Cai & R.Li, 2020 accepted as Purpureonostoc F.F.Cai & R.H.Li, 2020
33. Genus Sphaeronema Umezaki, 1961 (nom. illeg.)
34. Genus Sphaeronostoc Elenkin, 1931 accepted as Nostoc Vaucher ex Bornet & Flahault, 1886
35. Genus Sphaerospermum Zapomelová, Jezberová, Hrouzek, Hisem, Reháková & Komárková, 2009 accepted as Sphaerospermopsis Zapomelová, Jezberová, Hrouzek, Hisem, Reháková & Komárková, 2010
36. Genus Stratonostoc Elenkin, 1936
37. Genus Tremella Linnaeus, 1753 accepted as Nostoc Vaucher ex Bornet & Flahault, 1886
38. Genus Anabainella Gaillon, 1833 (uncertain)
39. Genus Coleospermopsis Hauer & al., 2015 (uncertain)
40. Genus Hilsia Kirchner ex Frank, 1886 (uncertain)
41. Genus Hormosiphon Kützing, 1843 (uncertain > nomen dubium)
42. Genus Hormothamnium (uncertain > nomen dubium)
43. Genus Nostochium Link, 1820 (uncertain)
44. Genus Spelaea Miscoe et al., 2015 (uncertain)
45. Genus Tolypothrichopsis Hauer et al., 2015 (uncertain)
46. Genus Undina E.M.Fries (uncertain)

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