Superorder Stirodonta Jackson 1912 (sea urchin)
Parent taxon: Echinacea according to A. B. Smith 1991
See also Grant and Hertlein 1938
Sister taxa: Arbacioida, Besairiecidaris, Bramus, Camarodonta, Crinocidaris, Glyphopneustidae, Plesiocidaroida, Stomopneustoida, Temnopleuroidea
Subtaxa: Hemicidaroida
Ecology: epifaunal grazer-deposit feeder
Distribution:
• Cretaceous of Bolivia (2 collections), Brazil (4), Egypt (6), France (1), Jordan (2), Nigeria (8), Saudi Arabia (2), Tunisia (1), USSR (1), the United Arab Emirates (1), the United Kingdom (3), Yemen (1)
Total: 32 collections including 34 occurrences