Echinoidea - Euechinoidea - Pseudodiadematidae
Full reference: A. Pomel. 1883. Classification méthodique des échinides vivants et fossiles. Adolphe Jourdan, Alger 1-131
Parent taxon: Carinacea according to A. Kroh and A. B. Smith 2010
See also Berndt 2003, Fell and Pawson 1966 and Smith 1991
Sister taxa: Calycina, Hemicidaridae, Irregularia, Orthopsidae
Subtaxa: Acrocidaris Heterodiadema Hypodiadema Loriolia Microdiadema Polydiadema Tetragramma Tiaromma
Ecology: epifaunal grazer-deposit feeder
Distribution:
• Cretaceous of Algeria (1 collection), Brazil (8), Chile (1), Egypt (25), France (40), Hungary (1), Jordan (4), Madagascar (2), Morocco (2), Nigeria (3), Peru (1), Portugal (8), Saudi Arabia (6), Serbia and Montenegro (1), Spain (5), Switzerland (2), the United Arab Emirates (1), the United Kingdom (15), United States (2: Arkansas, Texas), Yemen (1)
• Jurassic of Ethiopia (1), France (5), Germany (3), Italy (1), Poland (4), Saudi Arabia (4), Somalia (1), Switzerland (3)
• Triassic of Italy (1)
Total: 152 collections including 196 occurrences