Echinoidea - Spatangoida - Hemiasteridae
Belongs to Hemiaster according to C. W. Cooke 1953
See also Clark and Twitchell 1915
Sister taxa: Hemiaster (Bolbaster), Hemiaster (Gregoryaster), Hemiaster (Hemiaster), Hemiaster (Holanthus), Hemiaster (Integraster), Hemiaster (Leymeriaster), Hemiaster (Trachyaster), Hemiaster aequisgranensis, Hemiaster alamedensis, Hemiaster amelianus, Hemiaster antillensis, Hemiaster arcolensis, Hemiaster arcticus, Hemiaster atavus, Hemiaster beecheri, Hemiaster bufo, Hemiaster californicus, Hemiaster calvini, Hemiaster cholamensis, Hemiaster comanchei, Hemiaster delawarensis, Hemiaster dewalquei, Hemiaster elegans, Hemiaster globulosus, Hemiaster gonzalezmunozi, Hemiaster hattaensis, Hemiaster kuemmeli, Hemiaster moscovensis, Hemiaster orbignyi, Hemiaster oregonensis, Hemiaster parastatus, Hemiaster paronai, Hemiaster proclivus, Hemiaster regulusanus, Hemiaster sabinal, Hemiaster scutiger, Hemiaster sibiricus, Hemiaster stella, Hemiaster texanus, Hemiaster ungula, Hemiaster welleri, Hemiaster wetherbyi, Hemiaster zululandensis
Type specimen: Its type locality is Yellowstone River, 150 miles above mouth, which is in a Maastrichtian marine shale in the Pierre Shale Formation of Montana
Ecology: slow-moving shallow infaunal deposit feeder-detritivore
Distribution:
• Cretaceous of United States (6: Arkansas, Mississippi, Montana, Utah, Wyoming collections)
Total: 6 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.