†Polydiadema (sea urchin)
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Echinoidea - Euechinoidea - Pseudodiadematidae
Synonym: Girardema Vadet 1993
Parent taxon: Pseudodiadematidae according to H. B. Fell and D. L. Pawson 1966
See also Grant and Hertlein 1938, Quereilhac and Guinot 2011 and Sepkoski 2002
Sister taxa: Acrocidaris, Heterodiadema, Hypodiadema, Loriolia, Microdiadema, Tetragramma, Tiaromma
Subtaxa: Girardema bipunctatum Polydiadema joaquinensis
Ecology: epifaunal grazer-deposit feeder
Distribution:
• Cretaceous of France (23 collections), Madagascar (1), Portugal (2), the United Kingdom (9)
• Jurassic of France (2), Germany (1), Switzerland (2)
Total: 40 collections including 42 occurrences
Specimen images are retrieved through the ePANDDA API.
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