Full reference: P. M. Duncan. 1889. A revision of the genera and great groups of the Echinoidea. Journal of the Linnean Society, Zoology 23:1-311
Parent taxon: Acroechinoidea according to A. Kroh and A. B. Smith 2010
See also Fell 1966, Sepkoski 2002 and Smith 1995
Sister taxa: Aspidodiadematoida, Carinacea, Micropygoida, Nicolleaumatidae, Orthopsida, Pedinoida, Pedinopsidae
Subtaxa: Ancylocidaris Diadematidae Diadematoina Endeodiadema Engelia Helodiadema Heteropedina Macrodiadema
Ecology: slow-moving low-level epifaunal grazer
Distribution:
• Quaternary of Eritrea (1 collection), Jamaica (1), Japan (1)
• Pliocene to Pleistocene of Saudi Arabia (1)
• Miocene of Cuba (1), Germany (1), Spain (1), United States (1: California)
• Oligocene of Germany (2)
• Eocene of Somalia (1)
• Cretaceous of Antarctica (3), Belgium (1), France (1), Germany (1), the Netherlands (1), Spain (1), the United Kingdom (1)
• Jurassic of France (2), Switzerland (1), the United Kingdom (1), United States (1: California)
• Triassic of Hungary (1), Italy (1)
Total: 27 collections each including a single occurrence