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Published online by Cambridge University Press: 19 July 2017
Crinozoans and Blastozoans typically occur in very diverse epifaunal suspension feeding communities. In Lower Mississippian rocks of Indiana, as many of 155 benthonic invertebrate species lived in a single community (Ausich, Kammer, & Lane, 1979; Lane, 1973, Ausich & Lane, 1980). How did so many species co-exist? According to current ecological literature each species should have occupied a separate niche. If so, what limiting factors controlled niche differentiation within these communities?