Bulinus wrightiBulinus wrighti is a species of small tropical air-breathing freshwater snail with a sinistral shell, an aquatic pulmonate gastropod mollusk in the family Bulinidae.DistributionThe type [locality (biology)|type locality] is Wadi Hatib, at about 1280 m. southeast of Nisab District, Upper Aulaqui District at Rassais, South Yemen.