The protists in the Alveolata have a system of abutting membranous sacs, called “alveoli”, positioned beneath the plasma membrane. Dinoflagellates and ciliates are common examples of algae in this group.
SAR supergroup
Infrakingdom Alveolata
Acavomonidia
Apicomplexa
Ciliates
Chromerida
Colponemidia
Colpodellida
Dinoflagellates (Phylum Dinophyceae)
Perkinsozoa
Voromonadida
Paleoproterozoic - present
Tree of Life Web Project