Entodiniomorphida is an order of ciliates. There are 137 species of Entodiniomorphida, in 43 genera and 10 families. It includes groups like Buetschliidae, Ditoxidae, and Ophryoscolecidae.
Definition: A group of species that exploit the same food resources, and/or use the same feeding or foraging methods. http://en.wikipedia.org/wiki/Guild_(ecology)