Circinaria concava (Say, 1821) accepted as Haplotrema concavum (Say, 1821) (basis of record)
Limnaea humilis Say, 1822 accepted as Galba humilis (Say, 1822) (additional source)
Omphalina fuliginosa (A. Binney, 1841) accepted as Mesomphix cupreus (Rafinesque, 1831) (additional source)
Polygyra (Mesodon) albolabris (Say, 1817) accepted as Neohelix albolabris albolabris (Say, 1817) (basis of record)
Polygyra (Mesodon) exoleta (A. Gould, 1851) accepted as Mesodon zaletus (A. Binney, 1837) (basis of record)
Polygyra (Mesodon) thyroides (Say, 1817) accepted as Mesodon thyroidus (Say, 1817) (basis of record)
Polygyra (Stenotrema) hirsutum (Say, 1817) represented as Stenotrema hirsutum (Say, 1817) (basis of record)
Polygyra (Stenotrema) monodon fraterna (Say, 1824) accepted as Euchemotrema fraternum (Say, 1824) (basis of record)
Polygyra (Triodopsis) inflecta (Say, 1821) accepted as Inflectarius inflectus (Say, 1821) (basis of record)
Polygyra (Triodopsis) tridentata fraudulenta Pilsbry, 1894 accepted as Triodopsis fraudulenta (Pilsbry, 1894) (basis of record)
Pyramidula alternata (Say, 1817) accepted as Anguispira alternata (Say, 1817) (additional source)
Pyramidula perspectiva (Say, 1817) accepted as Discus patulus (Deshayes, 1832) (additional source)
Vitrea arborea (Say, 1817) accepted as Zonitoides arboreus (Say, 1817) (basis of record)