 Oligolimax annularis VITRINIDAE |
 Oligolimax musignani VITRINIDAE |
 Orcula conica ORCULIDAE |
 Orcula dolium ORCULIDAE |
 Orcula gularis ORCULIDAE |
 Orcula spoliata ORCULIDAE |
 Orculella templorum ORCULIDAE |
 Otala punctata HELICIDAE |
 Ovatella firmini ELLOBIIDAE |
 Oxychilus adamii ZONITIDAE |
 Oxychilus alicurensis ZONITIDAE |
 Oxychilus canini ZONITIDAE |
 Oxychilus carotii ZONITIDAE |
 Oxychilus clarus ZONITIDAE |
 Oxychilus denatale ZONITIDAE |
 Oxychilus depressus ZONITIDAE |
 Oxychilus diductus ZONITIDAE |
 Oxychilus draparnaudi ZONITIDAE |
 Oxychilus egadiensis ZONITIDAE |
 Oxychilus fuscosus ZONITIDAE |
 Oxychilus gardinii ZONITIDAE |
 Oxychilus glaber ercicus ZONITIDAE |
 Oxychilus glaber glaber ZONITIDAE |
 Oxychilus hydatinus ZONITIDAE |
 Oxychilus ionicus ZONITIDAE |
 Oxychilus lagrecai ZONITIDAE |
 Oxychilus majori ZONITIDAE |
 Oxychilus meridionalis ZONITIDAE |
 Oxychilus mortilleti ZONITIDAE |
 Oxychilus nortoni ZONITIDAE |
 Oxychilus oglasicola ZONITIDAE |
 Oxychilus oppressus ZONITIDAE |
 Oxychilus paulucciae ZONITIDAE |
 Oxychilus perspectivus ZONITIDAE |
 Oxychilus pilula ZONITIDAE |
 Oxychilus polygyrus ZONITIDAE |
 Oxychilus uziellii ZONITIDAE |
 Oxyloma elegans SUCCINEIDAE |
 Oxyloma sarsii SUCCINEIDAE |
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