Rollomonadia
Rollomonadia is a group of single-celled flagellates. It contains a small group of heterotrophic flagellates known as katablepharids, as well as the abundant cryptomonads, which comprise the heterotrophic Goniomonadea and the photosynthetic Cryptophyceae. Together with Palpitomonas and the Endohelea heliozoans, they compose the phylum Cryptista.