Liocallonia oligomesa (H.A. Pilsbry, 1903) Cuba
Holospira orcutti P. Bartsch, 1925 Mexico, Saltillo
Microceramus orientalis C.G. Aguayo, 1935 Cuba
Holospira oritis H.A. Pilsbry& E.P. Cheatum, 1951 USA, Texas
Septilumen ornata (J. Gundlach in L. Pfeiffer, 1859) Cuba
Brachypodella oropuchensis G.C. Spence Venezuela
Eucalodium otoides F.G. Thompson, 1968 Chiapas, Mexico
Urocoptis ovata (G.P. Deshayes) Jamaica
Pycnoptychia oviedoiana (A.V.M.D. D'Orbigny,1842) Cuba
Pycnoptychia oviedoiana fabreana (F. Poey in L. Pfeiffer,1858) Cuba6 mm
Holospira painteri P. Bartsch, 1906 Puebla, Mexico
Microceramus paivanus (L. Pfeiffer, 1866) Cuba
Microceramus palenquensis (J. Gundlach in L. Pfeiffer, 1863) Cuba
Tetrentodon palenquensis M.L. Jaume& C. de la Torre, 1972 Cuba11 mm
Brachypodella pallida L. Pfeiffer, 1845 Puerto Rico8 mm
Torrecoptis pallidula (C. de la Torre, 1912) Cuba14 mm
Liocallonia palmae (J. Gundlach in L. Pfeiffer, 1876) Cuba
Microceramus palmarensis C. de la Torre& P. Bartsch, 1972 Cuba
Crossostephanus palmeri W.H. Dall & P. Bartsch,1908 Tamaulipas, Mexico
Hendersoniella palmeri (W.H. Dall, 1905) Mexico, San Luis Potosì
Holospira palmeri P. Bartsch, 1906 Mexico, San Luis Potosì
Tetrentodon palmeri C. de la Torre& P. Bartsch, 1972 Cuba
Heterocoptis parallela (C. de la Torre, 1912) Cuba
Trilamellaxis parallela C. de la Torre& P. Bartsch, 1972 Cuba17,5 mm
Trilamellaxis parallela guajabanaensis C. de la Torre& P. Bartsch, 1972 Cuba21,4 mm
Macroceramus parallelus R. Arango in L. Pfeiffer,1866 Cuba14 mm
Torrecoptis parvula C. de la Torre& P. Bartsch, 1972 Cuba
Haplocion pasonis (W.H. Dall, 1896) USA, Texas
Liocallonia patruelis (R. Arango, 1876) Cuba
Tetrentodon paucicostata C. de la Torre& P. Bartsch, 1972 Cuba
Torrecoptis paucicostata C. de la Torre& P. Bartsch, 1972 Cuba
Crossostephanus paucinoda F.G. Thompson& L.R. Correa-Sandoval, 1994 Tamaulipas, Mexico
Macroceramus pazi J. Gundlach in L. Pfeiffer, 1858 Cuba12 mm
Mychostoma pearmanaeanum (E. Chitty, 1853) Jamaica
Gongylostoma peccatrix C. de la Torre& P. Bartsch, 1972 Cuba