| As with other peridinioid dinoflagellates, calcareous dinoflagellate cysts most likely all have an archeopyle restricted to the epicyst. |
| Algae, diatoms, dinoflagellates, and photosynthetic bacteria all belong to this group of organisms. |
| The zooxanthellae in these corals are dinoflagellates, and it is suspected that there may be a relationship between their diversifications. |
| The plants are tiny single-celled algae, the zooxanthellae or symbiotic dinoflagellates, that live within the tissues of corals in great numbers. |
| The specific identity of endosymbiotic dinoflagellates from most zooxanthellate corals is unknown. |
| Other unicellular organisms found include bacteria, cyanobacteria, dinoflagellates, and other protists. |
