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Alphabetical list of families (-subfamilies)

Step up two levels to order Cypraeoidea       Step up a level to superfamily (or taxon of roughly equivalent rank) Cypraeoidea

Step backwards to previous family (-subfamily): Eatoniellidae     Step forwards to next family (-subfamily): Cypraeidae - Gisortiinae

Family (-subfamily) Amphiperatidae - Amphiperatinae - “spindle-cowries”  

Birostra (spindle-cowries)