Kingdom Plantae Haeckel (1866) - plants
   Subkingdom Rhodoplantae G.W.Saunders & Hommers. (2004)
     Phylum Cyanidiophyta Moehn ex Doweld (2001) [monotypic] see Subphylum Cyanidiophytina
       Class Cyanidiophyceae Merola (1982) [monotypic]
         Order Cyanidiales Doweld (2001) [monotypic]
           .1 Genus Cyanidium L. Geitler (1933)
           .2 Genus Galdieria Merola (1982)
           1 Family Cyanidiaceae Geitler (1933)