Aporrhais potomacensis (FOSSIL) Clark & Martin, 1901 †
Helicaulax pozaryskii (FOSSIL) Abdel-Gawad, 1986 †
Alaria praelonga (FOSSIL) W.H. Hudleston, 1888 †
Aporrhais praeteritus (FOSSIL) O. Böttger, 1906 †
Alaria primigenia (FOSSIL) W.H. Hudleston, 1887 †
Digitolabrum princeps (FOSSIL) (Vasseur, 1881 †)
Perissoptera prolabiata (FOSSIL) (White, 1876 †)
Pterocerella propinqua (FOSSIL) (Kaunhowen, 1898 †)
Struthioptera protuberatus (FOSSIL) (Stanton, 1901 †)
Ceratosiphon provincialis (FOSSIL) (A.V.M.D. D'Orbigny,1843 †)
Alaria pseudoarmata (FOSSIL) W.H. Hudleston, 1884 †
Bicorempterus pseudopellatus (FOSSIL) (Gerasimov, 1992 †)
Aporrhais pugens (FOSSIL) Wollemann, 1908 †
Monocuphus pulcher (FOSSIL) L.É.S. Piette, 1876 †
Kaunhowenia punctata (FOSSIL) S. Kiel & K. Bandel,2002 †
Helicaulax pyrenaicus (FOSSIL) (A.V.M.D. D'Orbigny,1843 †)
Aporrhais pyriformis (FOSSIL) (Kner, 1850 †)
Graciliala quaasi (FOSSIL) S. Kiel & K. Bandel,2002 †
Drepanocheilus quadriliratus (FOSSIL) (B. Wade, 1926 †)
Anchura quitmanensis (FOSSIL) Stanton, 1947 †
Perissoptera rahmani (FOSSIL) H.A. Kollmann, 1978 †
Diarthema ranelloides (FOSSIL) H.É. Sauvage & Rigaux,1871 †
Aporrhais rapax (FOSSIL) Böhm, 1891 †
Pietteia rarispina (FOSSIL) (Schlumberger, 1864 †)
Anchura raritanensis (FOSSIL) H.G. Richards, 1943 †
Cultrigera rauffi (FOSSIL) Böhm, 1891 †
Kangilioptera ravni (FOSSIL) (Rosenkrantz, 1970 †)
Tulochilus retisurus (FOSSIL) (J.D. Stilwell, 2003 †)
Ceratosiphon retusus (FOSSIL) (G.B. Sowerby in Fitton,1836 †)
Perissoptera reussi (FOSSIL) (H.B. Geinitz, 1842 †)
Mexopus robustus (FOSSIL) S. Kiel& del Carmen Perrilliat, 2001 †
Volgacheilus rogovi (FOSSIL) A.V. Guzhov, 2014 †
Maussenetia roquesi (FOSSIL) Tessier, 1952 †
Latiala rostrata (FOSSIL) (W.M. Gabb, 1860 †)
Lispodesthes rotundatus (FOSSIL) Waring, 1917 †