Phylum Cyanobacteria Garcia-Pichel et al. (2020) see Phylum Cyanobacteriota Oren et al. 2022
   Class Cyanophyceae Hauck (1885) see Class Chroococcophyceae Hollerbach et al. 1953
     Order Leptolyngbyales Strunecký & Mareš (2023) [paraphyletic] see Order Leptolyngbyales Strunecký and Mareš 2023
       1 Family Neosynechococcaceae Strunecký & Mareš (2023) [monotypic] see Family Neosynechococcaceae Strunecký and Mareš 2023
       2.1 Family Trichocoleusaceae T.Mai & J.R.Johans. (2018), sedis mutabilis see Family Trichocoleusaceae Mai and Johansen 2018
       2.2.1 Family Leptolyngbyaceae Komárek, J. Kaštovský, J. Mareš & J.R.Johans. (2014) [sister group to excluded taxa] see Family Leptolyngbyaceae (Anagnostidis and Komárek 1988) Komárek et al. 2014