Eucalycoceras pentagonus (FOSSIL) A.J. Jukes-Browne, 1896 † UK, England
Mantelliceras phoenixense (FOSSIL) Anderson, 1958 † USA, Oregon, Jackson
Proeucalycoceras picteti (FOSSIL) S.H. Wright& J. Kennedy, 1990 † France, Haute-Normandie, Seine-Maritime275 mm
Mantelliceras picteti (FOSSIL) A. Hyatt, 1903 † France, Calais109 mm
Newboldiceras planecostatum (FOSSIL) (Kossmat, 1897 †) Algeria
Acanthoceras pollocense (FOSSIL) Benavides-Caceres, 1956 † Peru, Cajamarca, Celendín
Paramammites polymorphus (FOSSIL) (Pervinquiére, 1907 †) France, Languedoc-Roussillon, Gard
Dunveganoceras pondi (FOSSIL) F. Haas, 1949 † Canada, British Columbia, Peace River
Mantelliceras portalesi (FOSSIL) Kellum & Mintz, 1962 † Mexico, Coahuila, Francisco I. Madero
Dunveganoceras poucecoupense (FOSSIL) Warren & Stelck, 1940 † Canada, British Columbia, Peace River
Mammites powelli (FOSSIL) J. Kennedy & al., 1987 † Mexico, Chihuahua
Metoicoceras praecox (FOSSIL) F. Haas, 1949 † USA, Wyoming, Big Horn
Dunveganoceras problematicum (FOSSIL) Cobban, 1988 †
Protacanthoceras proteus (FOSSIL) Wright & J. Kennedy,1980 †
Romaniceras pseudodeverianum (FOSSIL) (Jimbo, 1984 †) Hokkaido
Pseudaspidoceras pseudonodosoides (FOSSIL) (Choffat, 1898 †) Brazil, Sergipe, Japaratuba
Kamerunoceras puebloense (FOSSIL) Cobban & P.H. Scott,1972 † Nigeria, Abia, Umu-Nneochi43 mm
Spathites puercoensis (FOSSIL) (Herrick & Johnson,1900 †) Mexico, Chihuahua, Coyame del Sotol61 mm
Romaniceras purisima (FOSSIL) Verma & Westermann 1973 † Mexico, Veracruz, Pajapan
Microsulcatoceras puzosiiforme (FOSSIL) J. Kennedy & Cobban,1990 † United States, Montana, Carter
Mammites rancheriae (FOSSIL) Anderson, 1958 †
Quitmaniceras reaseri (FOSSIL) Powell, 1963 † Mexico, Nuevo León, Vallecillo
Watinoceras reesidei (FOSSIL) Warren, 1930 † Cameroon, Sud-Ouest, Fako
Pseudaspidoceras reesidei (FOSSIL) Benavides-Caceres, 1956 †
Pseudoaspidoceras reesidei (FOSSIL) Benavides-Caceres, 1956 † Peru, Cajamarca, San Miguel
Acompsoceras renevierii (FOSSIL) (Sharpe, 1857 †) France, Calais260 mm
Jeanrogericeras revelerianus (FOSSIL) (Courtiller, 1860 †) France, Loire
Jeanrogericeras reveliereanus (FOSSIL) Wiedmann, 1960 † France105 mm
Benueites reymenti (FOSSIL) M. Collignon, 1966 † Venezuela, Trujillo
Yubariceras reymenti (FOSSIL) (M. Collignon, 1967 †) Mexico, Chihuahua, Coyame del Sotol
Graysonites reynoldsi (FOSSIL) Kellum & Mintz, 1962 † Mexico, Coahuila, Francisco I. Madero
Acanthoceras rhotomagense (FOSSIL) (A. Brongniart, 1822 †) France, Sarthe180 mm
Acanthoceras rhotomagense sussexiense (FOSSIL) (Mantell †) UK, Isle of Wight
Spathites rioensis (FOSSIL) Powell, 1963 † USA, Texas, Hudspeth
Acanthoceras robustum (FOSSIL) Crick, 1907 † Nigeria, Cross River, Odukpani