Order Holasteroida Durham and Melville 1957 (sea urchin)
Full reference: J. W. Durham and R. V. Melville. 1957. A classification of Echinoids. Journal of Paleontology 31:242-272
Parent taxon: Atelostomata according to A. Kroh and A. B. Smith 2010
See also Sepkoski 2002, Smith 1991 and Smith 1995
Sister taxa: Acrolusiidae, Asternata, Aulacopygus, Collyritidae, Disasteridae, Notidisaster, Orbigniana, Pycnasterides, Spatangoida, Sternata, Tithoniidae
Subtaxa: Calymnidae Coraster Corechinus Coryslus Eoholaster Hemipneustidae Menuthiaster Meridosternata Nordenskjoeldaster Physaster Pomaster Pseudholaster Pseudholasteridae Smithiaster Stenonasteridae Turanglaster
Ecology: semi-infaunal detritivore