Perkinsozoa (Perkinsids) is a phylum of alveolates. There are 23 species of Perkinsids, in 9 genera and 3 families. It includes groups like Parviluciferaceae.
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)