Classification System - Domain: Eukarya; Kingdom: Animalia; Subkingdom: Eumetazoa; Superphylum: Deuterostomia; Phylum: Echinodermata; Class: Echinodea; Subclass: Euchinoidea; Superorder: Gnathostomata; Order: Clypeasteroida; Suborder: Rotulina; Family: Rotulidae; Genera: Rotula, Heliophora, Rotulidae
