Nannometoicoceras glabor (FOSSIL) Kennedy & Cobban, 1993d †
Nannometoicoceras glabrum (FOSSIL) J. Kennedy & Cobban,1990 †
Yubariceras gosavicum (FOSSIL) (Wiedmann, 1979 †)
Eucalycoceras gothicum (FOSSIL) Kossmat, 1895 †
Mitonia gracilis (FOSSIL) Renz & J. Alvarez, 1979 †
Acanthoceras granerosense (FOSSIL) Cobban & Scott, 1972 †
Calycoceras guerangeri (FOSSIL) (Spath, 1863 †)
Dunveganoceras hagei (FOSSIL) Warren & Stelck, 1955 †
Nebraskites haresiceratiforme (FOSSIL) J. Kennedy & Cobban,1988 †
Pseudocalycoceras harpax (FOSSIL) F. Stoliczka, 1864 †
Pseudocalycoceras haughi (FOSSIL) Pervinquiere, 1907 †
Protacanthoceras hosei (FOSSIL) Cobban, 1987 †
Kamerunoceras inaequicostatus (FOSSIL) Wiedmann, 1960 †
Alzadites incomptus (FOSSIL) J. Kennedy & Cobban,1990 †
Acompsoceras inconstans (FOSSIL) (F. Schlüter †)
Mantelliceras indicum (FOSSIL) (Kossmat, 1895 †)
Euomphaloceras inerme (FOSSIL) (Pervinquiere, 1907 †)
Cunningtoniceras inermis (FOSSIL) (Pervinquiére, 1907 †)
Burroceras irregulare (FOSSIL) Cobban,Hook & J. Kennedy, 1989 †
Kamerunoceras isovokyense (FOSSIL) M. Collignon, 1965 †
Nigericeras jacqueti (FOSSIL) Schneegans, 1943 †
Yubariceras japonicum (FOSSIL) E. Matsumoto, H. Saito& Fukada, 1957 †
Cunningtoniceras johnsonianum (FOSSIL) L.W. Stephenson, 1955 †
Acanthoceras joserita (FOSSIL) Stoyanow, 1949 †
Neocardioceras juddii (FOSSIL) Barrois & J. De Guerne,1898 †
Neocardioceras juddii barroisi (FOSSIL) Wright & J. Kennedy,1981 †
Acanthoceras jukesbrownei (FOSSIL) Spath, 1926 †
Romaniceras kallesi (FOSSIL) Zázvorka, 1958 †
Yubariceras kanei (FOSSIL) (Jones, 1938 †)
Neocardioceras laevigatum (FOSSIL) Cobban, 1988 †
Mrhiliceras lapparenti (FOSSIL) (Pervinquière, 1907 †)
Sharpeiceras laticlavium (FOSSIL) (Sharpe, 1855 †)
Metoicoceras latoventer (FOSSIL) L.W. Stephenson, 1953 †
Kamerunoceras lecointrei (FOSSIL) M. Collignon, 1966 †
Acanthoceras lecontei (FOSSIL) Anderson, 1958 †