Pleurocera nobilis nodosa I. Lea, 1861
Lithasia obovata (T. Say, 1829)
Anculosa occultata E.A. Smith, 1922
Elimia ocoeensis (I. Lea, 1868)
Goniobasis ohioensis (I. Lea, 1852)
Elimia olivula (T.A. Conrad, 1834)
Anculosa ornata I. Lea, 1868
Goniobasis osculata I. Lea, 1872
Gyrotoma ovoidea R.J. Shuttleworth, 1845
Holandriana ovoidea (J.R. Bourguignat, 1884)
Gyrotoma pagoda I. Lea, 1845
Goniobasis pagodiformis (J.G. Anthony, 1854)
Goniobasis pallidula (J.G. Anthony, 1854)
Pleurocera parvum I. Lea, 1862
Holandriana patula (FOSSIL) (L.M.D. Bellardi& O.G. Michelotti, 1841 †)
Anculosa paupercula I. Lea, 1862
Holandriana pecchioli (FOSSIL) (M. Hörnes, 1856 †)
Goniobasis pennsylvanica (H.A. Pilsbry, 1916)
Goniobasis perstriata (I. Lea, 1852)
Leptoxis picta T.A. Conrad, 1834
Elimia pilsbryi C. Goodrich, 1927
Neoradina pirenoidea (G. Nevill, 1884)
Leptoxis plicata T.A. Conrad, 1834
Elimia plicatastriata (A. Wetherby, 1876)
Holandriana ponderosa (J.R. Bourguignat, 1884)
Elimia porrecta I. Lea, 1863
Goniobasis postelli (I. Lea, 1858)
Elimia potosiensis (I. Lea, 1841)
Elimia potosiensis plebeius (J.G. Anthony, 1850)
Leptoxis praerosa T. Say, 1821
Pleurocera prasinata T.A. Conrad, 1834
Anculosa proxima T. Say, 1825
Goniobasis pulcherrima (J.G. Anthony, 1860)
Gyrotoma pumila I. Lea, 1860
Elimia pupaeformis I. Lea, 1864