Anadenidae Pilsbry, 1948 (original description)
Anadeninae Pilsbry, 1948 accepted as Anadenidae Pilsbry, 1948 (original description)
Anguispira (Anguispira) alternatus lawae Pilsbry, 1948 accepted as Anguispira alternata (Say, 1817) (original description)
Anguispira (Zonodiscus) kochi f. aperta Pilsbry, 1948 accepted as Anguispira kochi (L. Pfeiffer, 1846) (original description)
Anguispira alternata f. angulata Pilsbry, 1948 accepted as Anguispira alternata (Say, 1817) (original description)
Ariolimax Mörch, 1859 (additional source)
Ariolimax (Ariolimax) Mörch, 1859 represented as Ariolimax Mörch, 1859 (additional source)
Ariolimax (Meadarion) Pilsbry, 1948 represented as Ariolimax Mörch, 1859 (original description)
Discus patulus (Deshayes, 1832) (basis of record)
Discus patulus f. edentulus Pilsbry, 1948 accepted as Discus patulus (Deshayes, 1832) (original description)
Discus simillimus (Stearns, 1900) † (basis of record)
Gastrocopta (Albinula) Sterki, 1892 represented as Gastrocopta Wollaston, 1878 (additional source)
Gastrocopta (Gastrocopta) procera (A. Gould, 1840) represented as Gastrocopta procera (A. Gould, 1840) (basis of record)
Gastrocopta (Staurotrema) Pilsbry, 1948 represented as Gastrocopta Wollaston, 1878 (original description)
Gastrocopta armifera (Say, 1821) (additional source)
Gastrocopta contracta (Say, 1822) (additional source)
Gastrocopta proarmifera A. B. Leonard, 1946 † accepted as Gastrocopta ruidosensis (T. D. A. Cockerell, 1899) (additional source)
Gastrocopta tridentata (A. B. Leonard, 1946) accepted as Gastrocopta ruidosensis (T. D. A. Cockerell, 1899) (basis of record)
Helicodiscus salmonaceus Hemphill, 1890 (basis of record)
Helix perspectiva Say, 1817 accepted as Discus patulus (Deshayes, 1832) (source of synonymy)
Hemphillia glandulosa burringtoni Pilsbry, 1948 accepted as Hemphillia burringtoni Pilsbry, 1948 (original description)
Oxyloma (Neoxyloma) decampi gouldi Pilsbry, 1948 accepted as Oxyloma decampii (Tryon, 1866) (original description)
Oxyloma (Neoxyloma) effusa subeffusa Pilsbry, 1948 accepted as Oxyloma subeffusum Pilsbry, 1948 (original description)
Oxyloma (Neoxyloma) haydeni kanabensis Pilsbry, 1948 accepted as Oxyloma kanabense Pilsbry, 1948 (original description)
Oxyloma (Neoxyloma) nuttalliana chasmodes Pilsbry, 1948 accepted as Oxyloma chasmodes Pilsbry, 1948 (original description)
Oxyloma decampii gouldi Pilsbry, 1948 accepted as Oxyloma decampii (Tryon, 1866) (original description)
Pallifera hemphilli marmorea Pilsbry, 1948 accepted as Pallifera marmorea Pilsbry, 1948 (original description)
Philomycus (Pallifera) arizonensis Pilsbry, 1917 accepted as Pallifera arizonensis arizonensis (Pilsbry, 1917) accepted as Pallifera arizonensis (Pilsbry, 1917) (additional source)
Prophysaon (Mimetarion) vanattae Pilsbry, 1948 accepted as Prophysaon vanattae Pilsbry, 1948 (original description)
Prophysaon (Mimetarion) vanattae var. pardalis Pilsbry, 1948 accepted as Prophysaon vanattae Pilsbry, 1948 (original description)
Prophysaon boreale Pilsbry, 1948 (original description)
Pupa fallax Say, 1825 accepted as Merdigera obscura (O. F. Müller, 1774) (basis of record)
Pupa fallax sensu A. Gould, 1841 accepted as Pupoides albilabris (C. B. Adams, 1841) accepted as Pupoides nitidulus (L. Pfeiffer, 1839) (source of synonymy)
Pupa placida Say, 1829 accepted as Merdigera obscura (O. F. Müller, 1774) (basis of record)
Pupisoma dioscoricola f. insigne Pilsbry, 1920 accepted as Pupisoma (Ptychopatula) dioscoricola insigne Pilsbry, 1920 accepted as Pupisoma (Ptychopatula) dioscoricola (C. B. Adams, 1845) represented as Pupisoma dioscoricola (C. B. Adams, 1845) (basis of record)
Pyramidula lecontei Stearns, 1902 † accepted as Discus lecontei (Stearns, 1902) † (basis of record)
Pyramidula perspectiva (Say, 1817) accepted as Discus patulus (Deshayes, 1832) (source of synonymy)
Quickella (Mediappendix) rehderi Pilsbry, 1948 accepted as Mediappendix rehderi (Pilsbry, 1948) (original description)
Succinea (Novisuccinea) Schileyko & I. M. Likharev, 1986 accepted as Novisuccinea Schileyko & I. M. Likharev, 1986 (original description (unavailable nomenclaturally))
Succinea (Novisuccinea) pennsylvanica Pilsbry, 1948 accepted as Novisuccinea pennsylvanica (Pilsbry, 1948) (original description)
Succinea (Novisuccinea) pronophobus Pilsbry, 1948 accepted as Succinea wilsonii I. Lea, 1864 (original description)
Vertigo alpestris oughtoni Pilsbry, 1948 accepted as Vertigo oughtoni Pilsbry, 1948 (original description)

 Taxonomic remark

 for Pupa fallax sensu A. Gould, 1841

Gould did not describe this as a new species, but incorrectly identified the material as Pupa fallax Say, 1825 [details]