Heterolobosea (Lobose Amoebae) is a class of creatures. There are 123 species of Lobose Amoebae, in 34 genera and 9 families. It includes groups like Tulamoebidae and Creneidae.
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)