At the parasite journal club this week we will try again to discuss the myxozoans, a weird group of parasites within the opisthokonts. They are a strange group of microscopic sized metazoans related to the Cnidaria, and are found in aquatic habitats where they act as parasites of fish, amphibians, reptiles and rarely invertebrates.
Hartikainen, H., A. Gruhl and B. Okamura (2014). "Diversification and repeated morphological transitions in endoparasitic cnidarians (Myxozoa: Malacosporea)." Mol Phylogenet Evol 76: 261-269.