Hemicidaridae is a family of extinct sea urchins characterized by large, massive, club-shaped spines.

These epifaunal grazer-deposit feeders lived in Jurassic and Cretaceous ages (from 189.6 to 112.6 Ma).

[1] List of genera and subfamilies:[2][3] Fossils of species within this genus have been found in the Jurassic and Cretaceous sediments in Europe, Africa, North America and China.

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