Viviparus

Viviparus, common name the river snails, is a genus of large, freshwater snails with an operculum, aquatic gastropod mollusks.

They are primitive members of the clade Caenogastropoda. The old name of the genus used to be Paludina.

单词	Viviparus
释义	Viviparus 英语百科 Viviparus Viviparus, common name the river snails, is a genus of large, freshwater snails with an operculum, aquatic gastropod mollusks. They are primitive members of the clade Caenogastropoda. The old name of the genus used to be Paludina.
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