Cercozoa genera

Astracantha is a genus of planktonic phaeodaria and the only member of the family Astracanthidae. They are an unusual family of marine protists, but can be found across all oceans, from tropical to Arctic and Antarctic waters.

Paulinella is a genus of amoeboid protists with at least twelve species of freshwater and marine euglyphids. Like many other euglyphids, it is covered by rows of siliceous scales, and use filose pseudopods to crawl over the substrate of the benthic zone. Species within the group can be distinguished by features like the overall shell dimensions, the number of vertical scale rows (3–5), the number of scales per row (7–14) and the number of oral scales.

Euglypha is a genus of cercozoans. It includes the species Euglypha rotunda.

Trinema is a genus of testate amoeba in the phylum Cercozoa. It includes the species Trinema lineare. Species of Trinema are common in freshwater and terrestrial habitats.