Echinoidea - Diadematoida - Diadematidae
Full reference: J. E. Gray. 1855. Catalogue of the Recent Echinida, or Sea Eggs, in the Collection of the British Museum. Part I. Echinida Irregularia. Woodfall & Kinder, London 1-69
Parent taxon: Diadematoida according to A. Kroh and A. B. Smith 2010
See also Clark and Twitchell 1915, Fell 1966, Nisiyama 1966 and Philip 1963
Sister taxa: Ancylocidaris, Diadematoina, Endeodiadema, Engelia, Helodiadema, Heteropedina, Macrodiadema
Subtaxa: Australidiadema Centrostephanus Diadema Echinothrix Eodiadema Kierechinus Mesodiadema Palaeodiadema Pedinothuria Sierradiadema
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