Domain Eucaryota Subdomain Chlorota Doweld (2001) Kingdom Rhodymeniobiota Starobogatov ex Doweld (2001) Subkingdom Rhodymeniobiotina Doweld (2001) Phylum Cyanidiophyta Moehn ex Doweld (2001) [monotypic] see Subphylum Cyanidiophytina 1 Class Cyanidiophyceae Merola (1982)