Echinoidea - Spatangoida - Hemiasteridae

Parent taxon: Hemiasteridae according to A. G. Fischer 1966

Sister taxa: Cheopsia, Crucibrissus, Distefanaster, Ditremaster, Hemiaster, Hernandezaster, Heterolampas, Holcopneustes, Hypsopatagus, Isopetalum, Palhemiaster, Psephoaster, Vomeraster, Washitaster

Subtaxa: Opissaster herrerae

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Ecology: slow-moving shallow infaunal deposit feeder-detritivore