This is a list of mollusks observed in the U.S. state of Utah. * (Pyrgulopsis pilsbryana) * (Pyrgulopsis peculiaris) * (Pyrgulopsis plicata) * Black Gloss (Zonitoides nitidus) * (Oreohelix parawanensis) * California floater (Anodonta californiensis) * (Pyrgulopsis inopinata) * Cloaked physa (Physa megalochlamys) * (Planorbella binneyi) * Creeping ancylid (Ferrissia rivularis) * (Pupilla hebes) * (Gastrocopta quadridens) * Cross vertigo (Vertigo modesta) * V. m. insculpta * V. m. corpulenta * V. m. parietalis * (Oreohelix peripherica) * Desert springsnail (Pyrgulopsis deserta) * (Tryonia porrecta) * (Oreohelix eurekensis) * O. e. eurekensis * O. e. uinta * Fat-whorled pondsnail (Stagnicola bonnevillensis) * Fish Lake physa (Physella microstriata) * (Stag