Wikipedia
Chondrocidaris
Chondrocidaris is a genus of sea urchins of the family Cidaridae described in 1863 by Alexander Agassiz. There are two living species and several fossil species dating as far back as the Miocene.
Living species:- Chondrocidaris brevispina
- Chondrocidaris gigantea
- Chondrocidaris clarkii
- Chondrocidaris marianica
- Chondrocidaris problepteryx