Pedinoida

Pedinoida is an order of sea urchins, containing the family Pedinidae with a single living genus, Caenopedina. The group was much more diverse during the Mesozoic, and represents the oldest surviving order of euechinoid sea urchins.

Pedinidae is a family of echinoderms.

species of echinoderm

species of echinoderm

species of echinoderm

Caenopedina is a genus of sea urchins of the family Pedinidae.