Domain Eucaryota Subdomain Chlorota Doweld (2001) Kingdom Rhodymeniobiota Starobogatov ex Doweld (2001) Subkingdom Cryptomonadobiotina Doweld (2001) [monotypic] Phylum Cryptomonadophyta Pascher (1931) Class Cryptomonadophyceae Pascher ex Schoenichen (1925)