†family Periasteridae Lambert 1920 (heart urchin)
Echinoidea - Spatangoida - Periasteridae
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: Paleopneustina according to A. Kroh and A. B. Smith 2010
Sister taxa: Paleopneustidea, Prenasteridae, Schizasteridae
Subtaxa: none
Ecology: slow-moving shallow infaunal deposit feeder-detritivore
Distribution: there are no occurrences of Periasteridae in the database