phylum (biology) the major taxonomic group of animals and plants; contains classes
kingdom protoctista,
protoctista in most modern classifications, replacement for the Protista; includes: Protozoa; Euglenophyta; Chlorophyta; Cryptophyta; Heterokontophyta; Rhodophyta; unicellular protists and their descendant multicellular organisms: regarded as distinct from plants and animals
protozoan,
protozoon any of diverse minute acellular or unicellular organisms usually nonphotosynthetic
class sarcodina,
sarcodina characterized by the formation of pseudopods for locomotion and taking food: Actinopoda; Rhizopoda