Threeridge Valvata

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Valvata tricarinata, common name the three-ridge valvata or threeridge valvata, is a species of small freshwater snail with a gill and an operculum, an aquatic gastropod mollusk in the family Valvatidae, the valve snails. Distribution This species occurs in North America. Shell description There is great variation in the degree of carination of the shell.

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