| genus |
Actinocephalus Kützing, 1843 |
doubtful |
| genus |
Aerosakkonema Nanda Kyaw Thu & Watanabe, 2012 |
doubtful |
| genus |
Arthrosiphon A.F.Weiss, 1984 |
doubtful |
| genus |
Arthrospira Sitzenberger ex Gomont, 1892 |
accepted |
| genus |
Arturoa P.González, 1951 |
doubtful |
| genus |
Atractella Printz, 1921 |
doubtful |
| genus |
Belaya V.P.Shuysky, 1973 |
doubtful |
| genus |
Blennothrix Kützing ex Anagnostidis & Komárek, 1988 |
accepted |
| genus |
Borzia Cohn ex Gomont, 1892 |
accepted |
| genus |
Borzia Cohn, 1883 |
doubtful |
| genus |
Calyptothrix J.W.Schopf, 1968 |
doubtful |
| genus |
Capilliphycus T.A.Caires, Sant'Anna & J.M.Nunes, 2019 |
doubtful |
| genus |
Capillus Caires, Sant'Anna & Nunes, 2018 |
doubtful |
| genus |
Cephalophytarion J.W.Schopf, 1968 |
doubtful |
| genus |
Chthonoblastus Kützing, 1843 |
accepted |
| genus |
Contortothrix Schopf, 1968 |
doubtful |
| genus |
Cyanonema Schopf, 1968 |
doubtful |
| genus |
Ernstiella R.Chodat, 1911 |
doubtful |
| genus |
Filiconstrictosus J.W.Schopf & J.M.Blacic, 1971 |
doubtful |
| genus |
Grandiphycus A.C.Nautiyal, 1978 |
doubtful |
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