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Genus: Catasigaloceras Buckman, 1923 † (DB: 1 SP)
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Catasigaloceras planicerclus
(Buckman †) (FOSSIL)
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Subgenus: Cosmoceras (Gulielmiceras) Buckman , 1920 † (DB: 2 SP)
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Cosmoceras (Gulielmiceras) alaskanum
Imlay, 1953 † (FOSSIL)
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Cosmoceras (Gulielmiceras) jason
(Reinecke, 1818 †) (FOSSIL)
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Genus: Gowericeras Buckman , 1921 † (DB: 2 SP)
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Gowericeras snugharborense
Imlay, 1953 † (FOSSIL)
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Gowericeras spinosum
Imlay, 1953 † (FOSSIL)
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Genus: Kepplerites Neumayr & Uhlig, 1892 † (DB: 5 SP)
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Kepplerites curtilobus
(Buckman, 1922 †) (FOSSIL)
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Kepplerites enodatum
(Nikitin, 1881 †) (FOSSIL)
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Kepplerites galilaei
(Buckman, 1922 †) (FOSSIL)
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Kepplerites gowerianus
(Sowerby 1827 †) (FOSSIL)
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Kepplerites keppleri
(Oppel, 1862 †) (FOSSIL)
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Genus: Kosmoceras Sowerby, 1816 † (DB: 14 SP)
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Kosmoceras bigoti
R. Douvillé, 1915 † (FOSSIL)
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Kosmoceras castor
Reinecke, 1818 † (FOSSIL)
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Kosmoceras castor bizeti
J.H.F. Douvillé, 1915 † (FOSSIL)
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Kosmoceras duncani
Sowerby, 1816 † (FOSSIL)
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Kosmoceras effulgens
(Buckman) † (FOSSIL)
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Kosmoceras fibuliferum
(Buckman, 1924 †) (FOSSIL)
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Kosmoceras gemmatum
B. Phillips, 1835 † (FOSSIL)
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Ammonites gemmatus B. Phillips, 1835 † =» Kosmoceras gemmatum
B. Phillips, 1835 †
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Kosmoceras lithuanicum
(Siemiradski, 1864 †) (FOSSIL)
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Kosmoceras ornatum
Schlotheim, 1820 † (FOSSIL)
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Kosmoceras phaeinum
(Buckman, 1924 †) (FOSSIL)
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Kosmoceras proniae
(Teysserre 1883 †) (FOSSIL)
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Kosmoceras spiculatum
(Buckman, 1924 †) (FOSSIL)
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Kosmoceras spinosum
Sowerby, 1826 † (FOSSIL)
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Kosmoceras spoliatum
F.A. von Quenstedt, 1858 † (FOSSIL)
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Kosmoceras tidmoorense
Arkell, 1939 † (FOSSIL)
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Genus: Seymourites Ravn, 1911 † (DB: 8 SP)
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Seymourites abruptus
McLearn, 1929 † (FOSSIL)
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Seymourites alticostatus
Imlay, 1953 † (FOSSIL)
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Seymourites gitinsi
McLearn, 1927 † (FOSSIL)
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Seymourites ingrahami
McLearn, 1929 † (FOSSIL)
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Seymourites mcevoyi
McLearn, 1928 † (FOSSIL)
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Seymourites multus
McLearn, 1929 † (FOSSIL)
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Seymourites plenus
McLearn, 1927 † (FOSSIL)
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Seymourites tychonis
J.P.J. Ravn, 1911 † (FOSSIL)
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Genus: Sigaloceras Hyatt in Eastman-Zittel, 1900 † (DB: 1 SP)
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Sigaloceras calloviense
(J. de C. Sowerby, 1815 †) (FOSSIL)
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Genus: Spinikosmoceras Buckman, 1924 † (DB: 2 SP)
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Spinikosmoceras aculeatum
(K.E.I. von Eichwald, 1893 †) (FOSSIL)
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Spinikosmoceras acutistriatum
Robson † (FOSSIL)
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Genus: Zugokosmoceras Jason † (DB: 1 SP)
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Zugokosmoceras obductum
Buckman, 1925 † (FOSSIL)
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Gulielmites obductus Buckman, 1925 † =» Zugokosmoceras obductum
Buckman, 1925 †
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