Ransoniella is a genus of sea snails, marine gastropod mollusks in the subfamily Erroneinae of the family Cypraeidae, the cowries. Most species in this genus have become a synonym of species in Notadusta Schilder, 1935

Cypraeidae, commonly named the cowries, is a taxonomic family of small to large sea snails. These are marine gastropod mollusks in the superfamily Cypraeoidea, the cowries and cowry allies.