Hemicidaridae
From Wikipedia, the free encyclopedia
| Hemicidaridae Temporal range: | |
|---|---|
 | |
| Fossil of Asterocidaris species | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Echinodermata |
| Class: | Echinoidea |
| Subclass: | Euechinoidea |
| 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]
