Infraclass
Carinacea
Mesocentrotus franciscanus. Photo: (c) juliabohemian, some rights reserved (CC BY-NC)
The infraclassis Carinacea includes most living species of regular sea urchin, and fossil forms going back as far as the Triassic.
Mesocentrotus franciscanus. Photo: (c) juliabohemian, some rights reserved (CC BY-NC)
The infraclassis Carinacea includes most living species of regular sea urchin, and fossil forms going back as far as the Triassic.