Fossaria modicella (Say, 1825) accepted as Galba modicella (Say, 1825)
Galba modicella (Say, 1825)
Gyraulus deflectus (Say, 1824)
Helisoma anceps (Menke, 1830)
Helisoma campanulatum (Say, 1821) accepted as Planorbella campanulata (Say, 1821)
Ladislavella arctica (I. Lea, 1864)
Ladislavella catascopium (Say, 1817)
Lymnaea arctica I. Lea, 1864 accepted as Ladislavella arctica (I. Lea, 1864)
Physa ancillaria Say, 1825 accepted as Physella ancillaria (Say, 1825) accepted as Physella gyrina (Say, 1821)
Physella ancillaria (Say, 1825) accepted as Physella gyrina (Say, 1821)
Physella gyrina (Say, 1821)
Planorbella campanulata (Say, 1821)
Stagnicola arctica (I. Lea, 1864) accepted as Ladislavella arctica (I. Lea, 1864)
Stagnicola catascopium (Say, 1817) accepted as Ladislavella catascopium (Say, 1817)