†family Plesiasteridae Lambert 1920 (heart urchin)
Echinoidea - Spatangoida - Plesiasteridae
Full reference: J. Lambert. 1920. Etude sur quelques formes primitives de Spatangidés. Bulletin de la Société des Sciences Historiques et Naturelles de l’Yonne 73:1-41
Parent taxon: Micrasterina according to A. Kroh and A. B. Smith 2010
Sister taxa: Aeropsidae, Micrasteridae, Ovulasteridae
Subtaxa: none
Ecology: slow-moving shallow infaunal deposit feeder-detritivore
Distribution: there are no occurrences of Plesiasteridae in the database