Protozoa Goldfuss, 1818 - protozoans Phylum Sarcomastigophora Honigberg & Balamuth, 1963 Subphylum Mastigophora Diesing, 1866 - flagellates Class Phytomastigophorea Calkins, 1909 - photosynthetic flagellates Order Prasinomonadida see Class Prasinophyceae T. Christensen, 1962 ex Ø. Moestrup & J. Throndsen (1988)