• Paratella Melichar, 1901 (uncertain)
• Penitella Valenciennes in Du Petit-Thouars, 1846
• Perditella Cockerell, 1899 (uncertain)
• Petitella Géry & Boutière, 1964 [Family: Characidae]
• Petitella Wise, 1996 accepted as Petitilla Wise, 1997 [Family: Pyramidellidae]
• Pilitella E.A. Assejeva in P.L. Shulga, 1976 †
• Piratella Assmann, 1928 † accepted as Lissocardia von Meyer, 1851 †
• Piretella Öpik, 1937 †
• Pirinella Schaffer, 1912 † accepted as Pirenella Gray, 1847
• Pirotella Sucic-Protic, 1985 †
• Pitella Langer, 1992 † [Family: Hauerinidae]
• Pitella Semikhatov, 1962 † [Family: Kussiellidae]
• Poricella Canu, 1904
• Porinella R. Santesson, 2004
• Poritella Schmidt, 1879
• Porpitella Haeckel, 1888 accepted as Porpita Lamarck, 1801 [Family: Porpitidae]
• Porpitella Pomel, 1883 † [Family: Scutellinidae]
• Portella Crasquin, 2008 †
• Pouitella Rage, 1988 † (uncertain)
• Pratella (Persoon) S.F. Gray, 1821 accepted as Agaricus Linnaeus, 1753
• Pricella Clausen, Korn & Luppold, 1991 †
• Prietella Carranza, 1954
• Primella Cooper, 1890 (uncertain)
• Pristella Eigenmann, 1908
• Protella Dana, 1853
• Puriella Strand, 1918 accepted as Trichophysetis Meyrick, 1884
• Pyrazella † (uncertain)
• Pyrella Swainson, 1835 (uncertain)
• Pyrenella Gray, 1857 (uncertain) [Family: Mollusca (awaiting allocation)]
• Pyrenella Monterosato, 1872 † accepted as Pirenella Gray, 1847 [Family: Potamididae]
• Pyrgella Lowe, 1855 (uncertain) [Family: Ferussaciidae]
• Pyrgella Paramonov, 1958 [Family: Pyrgotidae]
• Pyrgoella Cushman & White, 1936
• Pyrgotella Curran, 1934 (uncertain)
• Pyrilla Stål, 1859
• Pyruella Petuch, 1982 †
• Pyrulella Harmer, 1926
• Pyrumella Tikhomirova, 1989 † (uncertain)