Viviparus carinifer is an extinct species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Viviparidae, the river snails.
It lived between the Bathonian[2] and Bartonian[3] epochs; although it may have persisted into the Oligocene.
[3] V. carinifer is often found preserved in Purbeck Marble,[4] although it has also been found in Oxfordshire and Gloucestershire.
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