Kingdom Protista

Phylum # of species Description
Pyrrophyta ~2,000 Dinoflagellates (they have two flagella). Pectin and cellulose cell walls; mostly marine; chlorophylls a and c and carotenoids; food stored as starch.
Euglenophyta ~800 Euglena and its relatives. No cell wall; mostly freshwater; 1-3 anterior flagella; chlorophylls a and b and carotenoids.
Chrysophyta ~10,000 Diatoms and their allies. Cellulose and pectin cell walls, with silica in diatoms; marine or freshwater; chlorophylls a and c and carotenoids; food stored as oils.
Zoomastigina   Flagellates without chloroplasts. No cell wall; freshwater, symbiotic, or parasitic; one or more flagella; e.g., Trypanosoma.
Sarcodina ~40,000 Amoebas, foraminiferans, heliozoans, and radiolarians. No cell wall but some secrete shells with silica, calcium carbonate, etc; marine and freshwater; they have pseudopodia (extensions of membrane and cytoplasm, used for locomotion). E.g., Amoeba proteus.
Sporozoa   Parasitic protists. They have flagella or pseudopodia; complex life history; e.g., Toxoplasma, Plasmodium.
Ciliophora ~8,000 Ciliates. Two types of nuclei, cilia for locomotion and food collection; no cell wall; freshwater and marine, some parasites; e.g., Paramecium, Didinium.

Life on Earth