Class Cyanoprokaryota Komárek & Golubić 1990 nom. nud. - cyanoprokaryotes Subclass Synechococcophycidae Hoffmann, Komárek & Kaštovský (2005), nom. inval. Order "Synechococcales" Hoffmann, Komárek & Kaštovský (2005), nom. inval. see Order Synechococcales Hoffmann et al. 2005 nom. nud. Family Synechococcaceae Komárek & Anagn. (1995) see Family Synechococcaceae Komárek and Anagnostidis 1995 Genus "Thermosynechococcus" Katoh et al. (2001), nom. nud. see Genus Thermosynechococcus Katoh, Itoh, Shen & Ikeuchi (2020)