Nannometoicoceras glabor (FOSSIL) Kennedy & Cobban, 1993d †
Nannometoicoceras glabrum (FOSSIL) J. Kennedy & Cobban,1990 † USA, New Mexico, Cibola
Yubariceras gosavicum (FOSSIL) (Wiedmann, 1979 †) Austria, Tirol, Kufstein
Eucalycoceras gothicum (FOSSIL) Kossmat, 1895 † France
Mitonia gracilis (FOSSIL) Renz & J. Alvarez, 1979 † Venezuela, Portuguesa
Acanthoceras granerosense (FOSSIL) Cobban & Scott, 1972 †
Calycoceras guerangeri (FOSSIL) (Spath, 1863 †) USA, New Mexico
Dunveganoceras hagei (FOSSIL) Warren & Stelck, 1955 † Canada, Alberta, Division No. 19
Nebraskites haresiceratiforme (FOSSIL) J. Kennedy & Cobban,1988 †
Pseudocalycoceras harpax (FOSSIL) F. Stoliczka, 1864 †
Pseudocalycoceras haughi (FOSSIL) Pervinquiere, 1907 † Galapagos
Protacanthoceras hosei (FOSSIL) Cobban, 1987 †
Kamerunoceras inaequicostatus (FOSSIL) Wiedmann, 1960 † Morocco73 mm
Alzadites incomptus (FOSSIL) J. Kennedy & Cobban,1990 † USA, Arizona
Acompsoceras inconstans (FOSSIL) (F. Schlüter †)
Mantelliceras indicum (FOSSIL) (Kossmat, 1895 †) Mozambique, Maputo, Matutuíne
Euomphaloceras inerme (FOSSIL) (Pervinquiere, 1907 †) France, Charente-Maritime170 mm
Cunningtoniceras inermis (FOSSIL) (Pervinquiére, 1907 †) Algeria
Burroceras irregulare (FOSSIL) Cobban, Hook& J. Kennedy, 1989 † USA, New Mexico
Kamerunoceras isovokyense (FOSSIL) M. Collignon, 1965 † Madagascar
Nigericeras jacqueti (FOSSIL) Schneegans, 1943 † Niger, Zinder, Tanout
Yubariceras japonicum (FOSSIL) E. Matsumoto, H. Saito& Fukada, 1957 † Hokkaido
Cunningtoniceras johnsonianum (FOSSIL) L.W. Stephenson, 1955 †
Acanthoceras joserita (FOSSIL) Stoyanow, 1949 †
Neocardioceras juddii (FOSSIL) Barrois & J. De Guerne,1898 † Germany
Neocardioceras juddii barroisi (FOSSIL) Wright & J. Kennedy,1981 † UK, Devon
Acanthoceras jukesbrownei (FOSSIL) Spath, 1926 † France, Rhône-Alpes, Drôme260 mm
Romaniceras kallesi (FOSSIL) Zázvorka, 1958 † France, Loire
Yubariceras kanei (FOSSIL) (Jones, 1938 †) Mexico, Chihuahua, Coyame del Sotol
Neocardioceras laevigatum (FOSSIL) Cobban, 1988 †
Mrhiliceras lapparenti (FOSSIL) (Pervinquière, 1907 †)
Sharpeiceras laticlavium (FOSSIL) (Sharpe, 1855 †) France, Basse-Normandie, Calvados241 mm
Metoicoceras latoventer (FOSSIL) L.W. Stephenson, 1953 † USA, Texas, Grayson
Kamerunoceras lecointrei (FOSSIL) M. Collignon, 1966 †
Acanthoceras lecontei (FOSSIL) Anderson, 1958 †