"Valvata oregonensis is a species of fossil freshwater snail with a gill and an operculum, an aquatic gastropod mollusk in the family Valvatidae, the valve snails.Taylor (1966) stated that Valvata oregonensis is a synonym of Valvata whitei. Despite that the name Valvata oregonensis is still used (for example Pierce 1993)."@en . . . . . "Valvata whitei Hannibal, 1900" . "fossil" . . . . "Valvata tricarinata (Say, 1817) (in part)" . . "Valvata calli Hannibal, 1910" .