Domain Eucaryota Subdomain Chlorota Doweld (2001) Kingdom Rhodymeniobiota Starobogatov ex Doweld (2001) Subkingdom Cryptomonadobiotina Doweld (2001) [monotypic] Phylum Cryptomonadophyta Pascher (1931) Class Goniomonadophyceae Cavalier-Smith (1993) see Class Goniomonadea Caval.-Sm. (1993)