Cerion mumia obliterata C.J. Maynard, 1896
Cerion mumiola (L. Pfeiffer, 1839)
Cerion natensoni A. Gonzalez Guillén, 2008
Cerion nipense C.G. Aguayo, 1953
Cerion niteloides W.H. Dall, 1896
Cerion normale H.A. Pilsbry & H. Black,1930
Cerion normalis H.H. Beck, 1837
Cerion orientale W.J. Clench & C.G. Aguayo,1951
Cerion ornatula C.J. Maynard, 1913
Cerion ornatulaclappi (C.J. Maynard, 1913)
Cerion oweni W.H. Dall, 1905
Cerion oweni incisum W.H. Dall, 1905
Cerion paredonis H.A. Pilsbry, 1902
Cerion parva C.J. Maynard, 1894
Cerion pastelilloensis M.I. Sánchez Roig, 1951
Cerion paucicostatum (H.A. Pilsbry, 1929)
Cerion paucicostatum indianorum W.J. Clench, 1934
Cerion pauli M. Smith, 1943
Cerion peracutum W.J. Clench & C.G. Aguayo,1951
Cerion peracutum jaumei W.J. Clench & C.G. Aguayo,1953
Cerion pillsburyi H.A. Pilsbry & E.G. Vanatta,1897
Cerion pineria W.H. Dall, 1895
Cerion pinguis (G. Humphrey, 1797)
Cerion piraticus W.J. Clench, 1937
Cerion portillonis D.A. Welch, 1934
Cerion prestoni M.I. Sánchez Roig, 1951
Cerion pretiosus M.I. Sánchez Roig, 1951
Cerion processum (C.J. Maynard & W.F. Clapp,1920)
Cerion prognata (C.J. Maynard & W.F. Clapp,1920)
Cerion proteus J. Gundlach, 1860
Cerion pseudocyclostomum C.G. Aguayo& M.I. Sánchez Roig, 1953
Cerion pulla (C.J. Maynard & W.F. Clapp,1920)
Cerion pumilia (C.J. Maynard, 1894)
Cerion pupa P.F. Röding, 1798
Cerion pygmaeum H.A. Pilsbry & E.G. Vanatta,1896