Eucalycoceras pentagonus (FOSSIL) A.J. Jukes-Browne, 1896 †
Mantelliceras phoenixense (FOSSIL) Anderson, 1958 †
Proeucalycoceras picteti (FOSSIL) S.H. Wright & J. Kennedy,1990 †
Mantelliceras picteti (FOSSIL) A. Hyatt, 1903 †
Newboldiceras planecostatum (FOSSIL) (Kossmat, 1897 †)
Acanthoceras pollocense (FOSSIL) Benavides-Caceres, 1956 †
Paramammites polymorphus (FOSSIL) (Pervinquiére, 1907 †)
Dunveganoceras pondi (FOSSIL) F. Haas, 1949 †
Mantelliceras portalesi (FOSSIL) Kellum & Mintz, 1962 †
Dunveganoceras poucecoupense (FOSSIL) Warren & Stelck, 1940 †
Mammites powelli (FOSSIL) J. Kennedy & al., 1987 †
Metoicoceras praecox (FOSSIL) F. Haas, 1949 †
Dunveganoceras problematicum (FOSSIL) Cobban, 1988 †
Protacanthoceras proteus (FOSSIL) Wright & J. Kennedy,1980 †
Romaniceras pseudodeverianum (FOSSIL) (Jimbo, 1984 †)
Pseudaspidoceras pseudonodosoides (FOSSIL) (Choffat, 1898 †)
Kamerunoceras puebloense (FOSSIL) Cobban & P.H. Scott,1972 †
Spathites puercoensis (FOSSIL) (Herrick & Johnson,1900 †)
Romaniceras purisima (FOSSIL) Verma & Westermann 1973 †
Microsulcatoceras puzosiiforme (FOSSIL) J. Kennedy & Cobban,1990 †
Mammites rancheriae (FOSSIL) Anderson, 1958 †
Quitmaniceras reaseri (FOSSIL) Powell, 1963 †
Watinoceras reesidei (FOSSIL) Warren, 1930 †
Pseudaspidoceras reesidei (FOSSIL) Benavides-Caceres, 1956 †
Pseudoaspidoceras reesidei (FOSSIL) Benavides-Caceres, 1956 †
Acompsoceras renevierii (FOSSIL) (Sharpe, 1857 †)
Jeanrogericeras revelerianus (FOSSIL) (Courtiller, 1860 †)
Jeanrogericeras reveliereanus (FOSSIL) Wiedmann, 1960 †
Benueites reymenti (FOSSIL) M. Collignon, 1966 †
Yubariceras reymenti (FOSSIL) (M. Collignon, 1967 †)
Graysonites reynoldsi (FOSSIL) Kellum & Mintz, 1962 †
Acanthoceras rhotomagense (FOSSIL) (A. Brongniart, 1822 †)
Acanthoceras rhotomagense sussexiense (FOSSIL) (Mantell †)
Spathites rioensis (FOSSIL) Powell, 1963 †
Acanthoceras robustum (FOSSIL) Crick, 1907 †