8.19: Algae Last updated Jan 3, 2021 Save as PDF 8.18F: Amoebozoa and Opisthokonta 8.19A: Archaeplastida Page ID9848 BoundlessBoundless ( \newcommand{\kernel}{\mathrm{null}\,}\) Topic hierarchy8.19A: ArchaeplastidaArchaeplastida are a supergroup of protists that comprise red and green algae, which include unicellular, multicellular, and colonial forms.8.19B: Protists as Primary Producers, Food Sources, and Symbionts