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 | mostly freshwater eukaryotic algae having the chlorophyll masked by brown or yellow pigment; yellow-green and golden-brown algae and diatoms: Xanthophyceae, Chrysophyceae, Bacillariophyceae; some classification systems superseded or subsumed by Heterokontophyta |