MolluscaBase eds. (2025). MolluscaBase. Cypraea pyrum insularum (F. A. Schilder, 1928). Accessed through: Costello, M.J.; Bouchet, P.; Boxshall, G.; Arvanitidis, C.; Appeltans, W. (2025) European Register of Marine Species at: https://marbef.org/data/aphia.php?p=taxdetails&id=751547 on 2026-07-13
Costello, M.J.; Bouchet, P.; Boxshall, G.; Arvanitidis, C.; Appeltans, W. (2026). European Register of Marine Species. Cypraea pyrum insularum (F. A. Schilder, 1928). Accessed at: https://www.vliz.be/vmdcdata/narms/narms.php?p=taxdetails&id=751547 on 2026-07-13
original description(ofZonaria pyrum insularum F. A. Schilder, 1928)Schilder, F. A. (1928). Die variabilität der Schalenlänge der Cypraeidae (Moll. Gastr.). <em>Zoologischer Anzeiger.</em> 79 (1/2): 5-21. page(s): 9, 10. [details]