Domain Eucaryota Subdomain Chlorota Doweld (2001) Kingdom Peridiniobiota Starobogatov ex Doweld (2001) Subkingdom Parameciobiotina Starobogatov, 1986 [monotypic] Phylum Parameciozoa Kussakin & Drozdov, 1998 Subphylum Parameciozoina Doweld, 2001 Class Nassulatea Doweld, 2001