Hemiaster calvini from the Late Cretaceous Grayson Marl Fm. of Bell County, Texas (BEG 21268). Hemiaster calvini from the Late Cretaceous Grayson Marl Fm. of Denton County, Texas (BEG 21487). Hemiaster calvini from the Late Cretaceous Buda Limestone Fm. of Travis County, Texas (UT 14133). Hemiaster calvini from the Late Cretaceous Buda Limestone Fm. of Travis County, Texas (UT 39042).