Echinoidea - Euechinoidea - Hemicidaridae
Full reference: T. W. Wright. 1857. Monograph on the British fossil Echinodermata of the Oolitic Formations. Volume 1: the Echinoidea. Monographs of the Palaeontographical Society 1-154
Parent taxon: Carinacea according to A. Kroh and A. B. Smith 2010
See also Clark and Twitchell 1915, Fell and Pawson 1966 and Nisiyama 1966
Sister taxa: Calycina, Irregularia, Orthopsidae, Pseudodiadematidae
Subtaxa: Asterocidaris Cidaropsis Eurypneustes Gymnocidaris Hemicidaris Hemitiaris Hessotiara Leptarbacia Plesiocidaris Pseudocidaris Sphaerotiaris
Ecology: epifaunal grazer-deposit feeder
Distribution:
• Cretaceous of France (4 collections), Hungary (2), Japan (1), Mexico (1), Morocco (1), Portugal (8), Switzerland (11), United States (2: Texas)
• Jurassic to Cretaceous of China (1)
• Jurassic of Algeria (7), Eritrea (1), Ethiopia (2), France (8), Germany (4), Italy (1), Madagascar (1), Morocco (3), Poland (13), Portugal (25), Saudi Arabia (33), Somalia (2), Switzerland (2), Tunisia (18), the United Kingdom (3), United States (1: California), Yemen (2)
Total: 157 collections including 190 occurrences