Revised phylogeny and functional interpretation of the Edrioasteroidea based on new taxa from the early and Middle Ordovician of western Utah

Abstract

Five new edrioasteroid genera from the Early and Middle Ordovician of western Utah greatly enlarge the record of this scarce echinoderm class during its early diversification. Data from a diversity of taxa were used to generate a new phylogeny and classification of the edrioasteroids. New and reinterpreted morphology, particularly for the aboral surface, is introduced. -from Authors