†family Polydiadematidae Hess 1972 (sea urchin)
Echinoidea - Calycina - Polydiadematidae
Full reference: H. Hess. 1972. Eine Echinodermen-Fauna aus dem mittleren Dogger des Aargauer Juras. Schweizerische Paläontologische Abhandlungen 92:1-86
Parent taxon: Phymosomatoida according to A. Kroh and A. B. Smith 2010
Sister taxa: Boletechinus, Cottaldia, Diplopodiidae, Emiratiidae, Gauthiosoma, Heterodiadematidae, Leioechinus, Phymosomatidae, Trochotiara, Zeugopleurus
Subtaxa: none
Ecology: slow-moving low-level epifaunal omnivore
Distribution: there are no occurrences of Polydiadematidae in the database