| A | B |
|---|
| Stramenopila | synapomorphy: normally two flagella when present, with hairlike projections on one of them |
| Phylum Oomycota | (oomycetes – water molds, rusts, and downy mildews) |
| parasites or saprobes (feed on dead organic matter) | Phylum Oomycota* |
| Phylum Bacillariophyta | have chlorophylls a and c, so chloroplasts are like those of golden algae and brown algae |
| make chrysolaminarin, a unique carbohydrate used for energy storage (also made by golden algae) | Phylum Bacillariophyta* |
| Phylum Chrysophyta | have chlorophylls a and c, so chloroplasts are like those of diatoms and brown algae |
| make chrysolaminarin | Phylum Chrysophyta* |
| Phylum Phaeophyta | all multicellular, often large, including kelps |
| chloroplasts have chlorophylls a and c (like diatoms, golden algae, and dinoflagellates) | Phylum Phaeophyta |
| Rhizaria | produce elaborate shell-like coverings of cells |
| use very slender pseudopodia to move | Rhizaria* |
| Phylum Foraminifera | unicellular |
| marine group: some are plankton, most live attached to bottom or other organisms | Phylum Foraminifera* |
| Phylum Radiolaria | have glassy shells (external skeletons) made of silica |
| exoskeleton gives fixed shape, with bilateral or radial symmetry | Phylum Radiolaria* |
| Archaeplastida | synapomorphy: primary endosymbiosis – chloroplasts with a double membrane, derived from an ancestor directly engulfing a cyanobacterium |
| Phylum Rhodophyta | estimated 4000+ species; mostly marine and mostly multicellular |
| chloroplasts have phycobilins and chlorophyll a | Phylum Rhodophyta* |
| Phylum Chlorophyta | 7000+ species |
| diverse (mostly aquatic, both marine and freshwater species; some semi-terrestrial) | Phylum Chlorophyta* |
