Heliocidaris crassispina A. Agassiz 1863 (formerly Anthocidaris crassispina)
Family: Echinometridae	Order: Echinoida
Locality: Japan, Muroto Promontory (Pacific), Muroto, Kochi, Rocky zone, 1m	Dimensions: 69 Ø x 35 mm
Japanese name: Murasaki-uni Remark: The arcs of pore pairs are separated by two tubercles.