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Plagioptychidae DOUVILLÉ 1888

genera assigned to the family (link to taxonomic database)

Mitrocprina vidali Douvillé, 1904; left valve showing canals in inner shell layer; Campanian, Pyrenees, Spain (from Cestari & Sartorio 1995)

Canals along the ventral shell wall of left valve of Mitrocaprina boeotica (Munier-Chalmas, 1867); from Steuber 1999

Antillocaprinidae	Caprinidae	Caprotinidae
Diceratidae	Dictyoptychidae	Hippuritidae
Ichthyosarcolitidae	Plagioptychidae	Polyconitidae
Radiolitidae	Requieniidae	Family uncertain