Lioplax Troschel, 1857 (basis of record)
Lioplax cyclostomaformis (I. Lea, 1841) accepted as Lioplax cyclostomatiformis (I. Lea, 1844) (additional source)
Lioplax pilsbryi B. Walker, 1905 (additional source)
Lioplax subcarinata (Say, 1817) (additional source)
Lioplax sulculosa (Menke, 1828) (additional source)
Planorbella Haldeman, 1843 (basis of record)
Planorbella (Pierosoma) trivolvis (Say, 1817) represented as Planorbella trivolvis (Say, 1817) (basis of record)
Planorbella trivolvis (Say, 1817) (additional source)
Stagnicola arctica (I. Lea, 1864) accepted as Ladislavella arctica (I. Lea, 1864) (additional source)
Valvata bicarinata I. Lea, 1841 (additional source)
Valvata humeralis Say, 1829 (additional source)
Valvata lewisi Currier, 1868 (basis of record)
Valvata lewisi lewisi Currier, 1868 (additional source)
Valvata perdepressa B. Walker, 1906 (additional source)
Valvata sincera Say, 1824 (additional source)
Valvata sincera nylanderi Dall, 1905 (basis of record)
Valvata sincera sincera Say, 1824 (basis of record)
Valvata tricarinata (Say, 1817) (basis of record)
Valvata utahensis Call, 1884 (additional source)
Valvata virens Tryon, 1863 (additional source)
Valvata winnebagoensis F. C. Baker, 1928 (additional source)
Vorticifex (Parapholyx) G. D. Hanna, 1922 represented as Vorticifex Meek, 1870 (basis of record)
Vorticifex (Parapholyx) effusa (I. Lea, 1856) represented as Vorticifex effusa (I. Lea, 1856) (basis of record)
Vorticifex (Parapholyx) solida (Dall, 1870) represented as Vorticifex solida (Dall, 1870) (basis of record)