Belongs within: Opisthokonta. The Choanoflagellata are solitary or colonial protists with a collar of microvilli surrounding the base of the single flagellum (Adl et al. 2019). Collaring choanoflagellates Published 24 September 2022 Almost any body of water around the world is going to be home to choanoflagellates. These are small protozoans, up to about 10… Continue reading Choanoflagellata