Hemicidaridae Temporal range:
| |
---|---|
Fossil of Asterocidaris species | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Echinodermata |
Class: | Echinoidea |
Infraclass: | Carinacea |
Family: | †
Hemicidaridae Wright, 1857 |
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. [1]