Planorbidae Rafinesque, 1815
Planorbella ammon (Gould, 1855)
Planorbella binneyi (Tryon, 1867)
Planorbella campanulata (Say, 1821)
Planorbella columbiensis (F. C. Baker, 1945)
Planorbella corpulenta (Say, 1824)
Planorbella duryi (Wetherby, 1879)
Planorbella magnifica (Pilsbry, 1903)
Planorbella multivolvis (Case, 1847)
Planorbella nigricans (Spix, 1827)
Planorbella occidentalis (J. G. Cooper, 1870)
Planorbella oregonensis (Tryon, 1865)
Planorbella pilsbryi (F. C. Baker, 1926)
Planorbella scalaris (Jay, 1839)
Planorbella subcrenata (Carpenter, 1857)
Planorbella tenuis (Dunker, 1850)
Planorbella traski (I. Lea, 1856)
Planorbella trivolvis (Say, 1817)
Planorbella truncata (M. Miles, 1861)