†family Pygasteridae Lambert 1900 (sea urchin)
Echinoidea - Irregularia - Pygasteridae
Full reference: J. Lambert. 1900. Étude sur quelques échinides de l’infra-Lias et du Lias. Bulletin de la Société des Sciences Historiques et Naturelles de l’Yonne 53(2):3-57
Parent taxon: Irregularia according to A. Kroh and A. B. Smith 2010
See also Clark and Twitchell 1915 and Fell 1966
Sister taxa: Atelostomata, Echinoneoida, Holectypoida, Microstomata
Subtaxa: Pileus Plesiechinus Pygaster
Type: Pygaster
Ecology: epifaunal grazer-deposit feeder
Distribution:
• Cretaceous of France (5 collections)
• Jurassic of Germany (1), Iran (1), Madagascar (2), Poland (5), the United Kingdom (2), United States (1: Nevada)
Total: 17 collections including 19 occurrences