Acrocoelum richardsi Govoni, 2025 † (original description)
Acteon danicus Govoni, 2025 † (original description)
Anticlimax Pilsbry & McGinty, 1946 (additional source)
Anticlimax gardnerae Govoni, 2025 † (original description)
Aporrhaidae J. E. Gray, 1850 (additional source)
Ataphrus glandula (Conrad, 1830) † (basis of record)
Calyptraea aldrichi Govoni, 2025 † (original description)
Calyptraphorus jacksoni W. B. Clark, 1895 † (additional source)
Circulus Jeffreys, 1865 (additional source)
Cirsotrema (Coroniscala) de Boury, 1909 † represented as Cirsotrema Mörch, 1852 (additional source)
Crenilabium elatum (Koenen, 1885) † accepted as Nonacteonina elata (Koenen, 1885) † (additional source)
Creonella obscuriplica Govoni, 2025 † (original description)
Cyclostremiscus sohli Govoni, 2025 † (original description)
Entomope Cossmann, 1888 † (additional source)
Entomope marylandica (W. B. Clark & G. C. Martin, 1901) † (basis of record)
Eulima Risso, 1826 (additional source)
Eulima brightseatensis Govoni, 2025 † (original description)
Eulimidae R. A. Philippi, 1853 (additional source)
Evalea A. Adams, 1860 (additional source)
Gegania Jeffreys, 1884 accepted as Tuba I. Lea, 1833 (additional source)
Gilbertina texana J. A. Gardner, 1935 † (additional source)
Granosolarium Sacco, 1892 (additional source)
Kapalmerella Allmon, 2005 † (additional source)
Kapalmerella mortoni protomortoni Govoni, 2025 † (original description)
Lacinia pygmaea Govoni, 2025 † (original description)
Mathilda (Fimbriatella) crebricosta Govoni, 2025 † (original description)
Mathilda (Fimbriatella) marylandensis Govoni, 2025 † (original description)
Mathilda (Mathilda) O. Semper, 1865 accepted as Mathilda O. Semper, 1865 (basis of record)
Mathilda (Mathilda) kauffmani Govoni, 2025 † represented as Mathilda kauffmani Govoni, 2025 † (original description)
Neverita (Neverita) Risso, 1826 represented as Neverita Risso, 1826 (additional source)
Neverita (Neverita) potomacensis Govoni, 2025 † represented as Neverita potomacensis Govoni, 2025 † (original description)
Pasitheola marylandensis Govoni, 2025 † (original description)
Pseudocirsope O. Boettger, 1907 † (basis of record)
Pseudocirsope feorra Govoni, 2025 † (original description)
Pseudoliva longicostata Govoni, 2025 † (original description)
Pseudomalaxis ripleyana Wade, 1926 † (additional source)
Puposyrnola toulmini Govoni, 2025 † (original description)
Pyropsis Conrad, 1860 † (additional source)
Retusa (Cylichnina) sylvaerupis (G. D. Harris, 1899) † represented as Retusa sylvaerupis (G. D. Harris, 1899) † (basis of record)
Scaphander (Mirascapha) R. B. Stewart, 1927 † represented as Scaphander Montfort, 1810 (status source)
Scaphander (Priscaphander) potomacensis Govoni, 2025 † accepted as Priscaphander potomacensis (Govoni, 2025) † (original description)
Sigmesalia gnoma Govoni, 2025 † (original description)
Sigmesalia palmerae Govoni, 2025 † (original description)
Siphonalia potomacensis Govoni, 2025 † (original description)
Solariorbis Conrad, 1865 (additional source)
Solariorbis laurelae Govoni, 2025 † (original description)
Stellaxis Dall, 1892 † (additional source)
Teinostoma H. Adams & A. Adams, 1853 (additional source)
Teinostoma regularis Garvie, 2021 † (additional source)
Torcula J. E. Gray, 1847 (additional source)
Tornatellaea texana J. A. Gardner, 1935 † (additional source)
Turritella prehumerosa Govoni, 2025 † (original description)
Umbraculum Schumacher, 1817 (additional source)
Vitrinella C. B. Adams, 1850 (additional source)
Vitrinella (Vitrinellops) Pilsbry & Olsson, 1952 represented as Vitrinella C. B. Adams, 1850 (additional source)
Vitrinella (Vitrinellops) clarkmartinorum Govoni, 2025 † represented as Vitrinella clarkmartinorum Govoni, 2025 † (original description)
Zikkuratia danica Govoni, 2025 † (original description)