|Similar Hemicidaris, Saleniidae, Phymosomatidae, Pseudocidaris, Arbacioida|
Hemicidaridae is a family of fossils sea urchins in the classis Echinoidea.
These epifaunal grazer-deposit feeders lived in Jurassic and Cretaceous ages (from 189.6 to 112.6 Ma).
List of genera and subfamilies:
Fossils of species within this genus have been found in the Jurassic and Cretaceous sediments in Europe, Africa, North America and China.