Classification of Teichert et al. 1964
Cl. Cephalopoda Cuvier 1797
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Subcl. †Actinoceratoidea Teichert et al. 1964
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Or. †Actinocerida Teichert 1933
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Fm. †Actinoceratidae Saeman 1853
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G. †Ellinoceras Balashov 1960
G. †Floweroceras Miller and Youngquist 1947
G. †Kochoceras Troedsson 1926
G. †Leurorthoceras Foerste 1921
G. †Paractinoceras Hyatt 1900
G. †Saffordoceras Foerste and Teichert 1930
G. †Troostoceras Foerste and Teichert 1930
G. †Calhounoceras Troedsson 1926
Fm. †Carbactinoceratidae Schindewolf 1943
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G. †Aploceras d'Orbigny 1849
G. †Carbactinoceras Schindewolf 1935
G. †Rayonnoceras Croneis 1926
G. †Hopeioceras Shimuzu and Obata 1936
Fm. †Huroniidae Foerste and Teichert 1930
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G. †Discoactinoceras Kobayashi 1927
G. †Huronia Stokes 1824
G. †Huroniella Foerste 1924
Fm. †Ormoceratidae Saeman 1853
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G. †Deiroceras Hyatt 1884
G. †Eskimoceras Troedsson 1936
G. †Metarmenoceras Flower 1940
G. †Mstikhinoceras Shimanskiy 1961
G. †Orthonybyoceras Shimizu and Obata 1935
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Invalid names: Siberioceras [synonym], Treptoceras Flower 1942 [synonym]
G. †Parormoceras Shimizu and Obata 1935
G. †Troedssonoceras Foerste 1928
G. †Subtofangoceras Shimuzu and Obata 1936
G. †Akidocheilus Till 1907
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Subg. †Akidocheilus (Akidocheilus) Till 1907
Subg. †Akidocheilus (Planecapula) Shimanskiy 1947
Subcl. †Bactritoidea Shimanskiy 1951
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Or. †Bactritida Shimanskiy 1951
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G. †Bactrites Sandberger 1843
Fm. †Bactritidae Hyatt 1884
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G. †Ctenobactrites Shimanskiy 1951
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Subg. †Ctenobactrites (Ctenobactrites) Shimanskiy 1951
Subg. †Ctenobactrites (Mirites) Shimanskiy 1962
G. †Cyrtobactrites Erben 1960
G. †Eobactrites Schindewolf 1932
G. †Kokenia Holzapfel 1895
G. †Lobobactrites Schindewolf 1932
G. †Pseudobactrites Ferronniére 1921
G. †Sicilioceras Shimanskiy 1954
G. †Cochleiferoceras Shimanskiy 1962
G. †Cyclobactrites Shimanskiy 1955
G. †Devonobactrites Shimanskiy 1962
Fm. †Parabactritidae Shimanskiy 1948
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G. †Aktastioceras Shimanskiy 1948
G. †Belemnitomimus Shimanskiy 1954
G. †Microbactrites Shimanskiy 1954
G. †Parabactrites Shimanskiy 1948
G. †Tabantaloceras Shimanskiy 1954
G. †Conchorhynchus de Blainville 1827
G. †Dartoceras Foerste 1936
Subcl. †Endoceratoidea Teichert 1933
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G. †Changkiuoceras Shimizu and Obata 1935
G. †Colpoceras Hall 1850
G. †Conoceras Bronn 1837
G. †Diploceras Conrad 1842
Or. †Endocerida Hyatt in Zittel 1900
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Fm. †Cyrtendoceratidae Hyatt 1900
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G. †Boreoceras Miller and Youngquist 1947
G. †Cyclocyrtendoceras Balashov 1961
G. †Cyrtendoceras Remelé 1886
G. †Cyrtovaginoceras Kobayashi 1934
Fm. †Endoceratidae Hyatt 1884
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G. †Allocotoceras Teichert and Glenister 1953
G. †Cameroceras Conrad 1842
G. †Chazyoceras Flower 1958
G. †Endoceras Hall 1847
G. †Foerstellites Kobayashi 1940
G. †Kawasakiceras Kobayashi 1934
G. †Kotoceras Kobayashi 1934
G. †Kutorgoceras Balashov 1962
G. †Lamottoceras Flower 1955
G. †Liskeardia Wilson 1939
G. †Nanno Clarke 1894
G. †Suecoceras Holm 1896
G. †Triendoceras Flower 1958
G. †Vaginoceras Hyatt 1884
G. †Vaningenoceras Flower 1958
Fm. †Manchuroceratidae Kobayashi 1935
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G. †Coreanoceras Kobayashi 1931
G. †Manchuroceras Ozaki 1927
G. †Hemiceratites Eichwald 1840
G. †Hemipiloceras Shimizu and Obata
Or. †Intejocerida Balashov 1960
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G. †Kailuanoceras Obata 1940
G. †Kaipingoceras Shimizu and Obata 1937
G. †Linchengoceras Obata 1940
G. †Neokaipingoceras Obata 1940
G. †Paravaginoceras Kobayashi 1934
G. †Penhsioceras Endo 1932
G. †Pradoceras Sampelayo 1938
G. †Sidemina de Castelnau 1843
G. †Subpenhsioceras Shimizu and Obata 1936
G. †Trifurcatoceras Obata 1940
G. †Yehlioceras Shimizu and Obata 1937
G. †Erlangericheilus Shimanskiy 1947
G. †Gonatocheilus Till 1907
G. †Hadrocheilus Till 1907
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Subg. †Hadrocheilus (Arcuatobeccus) Shimanskiy 1947
Subg. †Hadrocheilus (Convexiterbeccus) Shimanskiy 1947
Subg. †Hadrocheilus (Dentatobeccus) Shimanskiy 1947
Subg. †Hadrocheilus (Globosobeccus) Shimanskiy 1947
Subg. †Hadrocheilus (Hadrocheilus) Till 1907
G. †Hedstroemoceras Foerste 1930
G. †Leptocheilus Till 1907
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Subg. †Leptocheilus (Leptocheilus) Till 1907
Subg. †Leptocheilus (Mesocheilus) Till 1909
Subcl. Nautiloidea Agassiz 1847 [nautiloid]
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Or. †Ascocerida Kuhn 1949
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Fm. †Ascoceratidae Barrande 1867
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Subfm. †Ascoceratinae Barrande 1867
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G. †Aphragmites Barrande 1865
G. †Ascoceras Barrande 1847
G. †Billingsites Hyatt 1864
G. †Glossoceras Barrande 1865
G. †Parascoceras Miller 1932
G. †Schuchertoceras Miller 1932
Fm. †Probillingsitidae Kröger 2013
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G. †Probillingsites Foerste 1928
G. †Shamattawaceras Foerste and Savage 1927
Or. †Barrandeocerida Flower and Kummel, Jr. 1950
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Fm. †Apsidoceratidae Hyatt 1884
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G. †Apsidoceras Hyatt 1884
G. †Charactoceras Foerste 1924
G. †Charactocerina Foerste 1935
G. †Chidleyenoceras Shimizu and Obata 1935
G. †Deckeroceras Foerste 1935
G. †Fremontoceras Foerste 1935
G. †Wilsonoceras Foerste 1929
Fm. †Barrandoceratidae Foerste 1925
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G. †Antiplectoceras Foerste and Savage 1927
G. †Avilionella Flower 1952
G. †Barrandeoceras Hyatt 1884
G. †Bickmorites Foerste 1925
G. †Centrocyrtoceras Foerste 1933
G. †Gasconsoceras Foerste 1936
G. †Haydenoceras Flower 1949
G. †Laureloceras Flower 1949
G. †Paquettoceras Foerste 1932
G. †Savageoceras Foerste 1930
Fm. †Lechritrochoceratidae Flower 1950
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G. †Catyrephoceras Foerste 1926
G. †Lechritrochoceras Foerste 1926
G. †Leurotrochoceras Foerste 1926
G. †Peismoceras Hyatt 1894
G. †Systrophoceras Hyatt 1894
G. †Trochodictyoceras Foerste 1926
Fm. †Nephriticeratidae Hyatt 1894
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G. †Baeopleuroceras Williams 1935
G. †Endoplanoceras Flower 1938
G. †Heracloceras Teichert 1940
G. †Lyrioceras Foerste 1927
G. †Nephriticeras Hyatt 1884
G. †Nephriticerina Foerste 1927
G. †Rhadinoceras Hyatt 1894
G. †Sphyradoceras Hyatt 1884
G. †Triplooceras Hyatt 1884
Fm. †Uranoceratidae Hyatt 1900
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G. †Cliftonoceras Flower 1957
G. †Jolietoceras Foerste 1925
G. †Uranoceras Hyatt 1884
Or. †Discosorida Flower 1950
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Fm. †Lowoceratidae Flower 1940
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G. †Endodiscosorus Teichert 1931
G. †Kayoceras Foerste 1934
G. †Lowoceras Foerste and Savage 1927
G. †Stokesoceras Foerste 1924
G. †Tuyloceras Foerste and Savage 1927
Fm. †Mandaloceratidae Flower and Teichert 1957
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G. †Cayugoceras Flower 1947
G. †Cinctoceras Flower 1957
G. †Mandaloceras Hyatt in Zittel 1900
G. †Ovocerina Flower 1957
G. †Pseudogomphoceras Flower 1957
G. †Umbeloceras Flower 1957
G. †Vespoceras Flower 1957
Fm. †Phragmoceratidae Miller 1877
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G. †Endoplectoceras Foerste 1924
G. †Phragmoceras Broderip 1839
G. †Phragmocerina Flower 1948
G. †Pristeroceras Ruedmann 1925
G. †Protophragmoceras Hyatt 1900
G. †Sthenoceras Flower 1957
G. †Tubiferoceras Hedström 1917
Fm. †Ruedemannoceratidae Flower 1940
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G. †Franklinoceras Flower 1957
G. †Ruedemannoceras Flower 1940
Fm. †Westonoceratidae Teichert 1933
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G. †Antiphragmoceras Foerste 1925
G. †Broeggeroceras Sweet 1958
G. †Clarkesvillia Flower 1946
G. †Faberoceras Flower 1946
G. †Glyptodendron Claypole 1878
G. †Lavaloceras Flower 1952
G. †Reedsoceras Foerste 1929
G. †Simardoceras Flower 1957
G. †Sinclairoceras Flower 1952
G. †Teichertoceras Foerste 1933
G. †Westonoceras Foerste 1924
G. †Winnipegoceras Foerste 1928
Or. †Ellesmerocerida Flower and Kummel, Jr. 1950
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Fm. †Baltoceratidae Kobayashi 1935
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G. †Bactroceras Holm 1898
G. †Cochlioceras Eichwald 1860
G. †Murrayoceras Foerste 1926
G. †Pachendoceras Ulrich and Foerste 1936
Fm. †Ellesmeroceratidae Kobayashi 1934
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G. †Albertoceras Ulrich and Foerste 1936
G. †Bridgeoceras Ulrich et al. 1943
G. †Buehleroceras Ulrich et al. 1943
G. †Burenoceras Ulrich and Foerste 1931
G. †Caseoceras Ulrich et al. 1943
G. †Chepuloceras Unklesbay and Young 1956
G. †Clarkoceras Ruedemann 1905
G. †Clelandoceras Ulrich et al. 1944
G. †Conocerina Ulrich and Foerste 1936
G. †Cumberloceras Ulrich et al. 1943
G. †Cyclostomiceras Hyatt 1900
G. †Dakeoceras Ulrich and Foerste 1931
G. †Desioceras Cecioni 1953
G. †Ellesmeroceras Foerste 1921
G. †Eremoceras Hyatt 1884
G. †Hemichoanella Teichert and Glenister 1954
G. †Lebetoceras Teichert and Glenister 1954
G. †Levisoceras Foerste 1925
G. †Loxochoanella Teichert and Glenister 1954
G. †Oelandoceras Foerste 1932
G. †Oneotoceras Ulrich 1926
G. †Paracyclostomiceras Cecioni 1953
G. †Smithvilloceras Ulrich et al. 1943
G. †Stemtonoceras Ulrich and Foerste 1936
G. †Ventroloboceras Teichert and Glenister 1954
G. †Woosteroceras Ulrich et al. 1944
Fm. †Plectronoceratidae Kobayashi 1935
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G. †Multicameroceras Kobayashi 1933
G. †Palaeoceras Flower 1954
G. †Plectronoceras Ulrich and Foerste 1933
G. †Ruthenoceras Korde 1954
G. †Sinoeremoceras Kobayashi 1933
G. †Wanwanoceras Kobayashi 1933
Or. Nautilida Agassiz 1847
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Superfm. †Aipocerataceae Hyatt 1883
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Fm. †Aipoceratidae Hyatt 1883
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G. †Aipoceras Hyatt 1883
G. †Asymptoceras Ryckholt 1852
G. †Librovitschiceras Shimanskiy 1957
Fm. †Scyphoceratidae Ruzhentsev and Shimanskiy 1954
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G. †Dentoceras Ruzhentsev and Shimanskiy 1954
G. †Mariceras Ruzhentsev and Shimanskiy 1954
G. †Scyphoceras Ruzhentsev and Shimanskiy 1954
G. †Venatoroceras Ruzhentsev and Shimanskiy 1954
Fm. †Solenochilidae Hyatt 1883
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G. †Acanthonautilus Foord 1896
G. †Solenochilus Meek and Worthen 1870
Superfm. †Clydonautilaceae Hyatt in Zittel 1900
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Fm. †Clydonautilidae Hyatt in Zittel 1900
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G. †Callaionautilus Kieslinger 1924
G. †Clydonautilus Mojsisovics 1882
G. †Cosmonautilus Hyatt and Smith 1905
G. †Proclydonautilus Mojsisovics 1902
Fm. †Ephippioceratidae Miller and Youngquist 1949
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G. †Ephippioceras Hyatt 1884
G. †Megaglossoceras Miller et al. 1933
Fm. †Liroceratidae Miller and Youngquist 1949
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G. †Alexandronautilus Shimanskiy 1962
G. †Bistrialites Turner 1954
G. †Coelogasteroceras Hyatt 1893
G. †Condraoceras Miller et al. 1947
G. †Hemiliroceras Ruzhentsev and Shimanskiy 1954
G. †Indonautilus Mojsisovics 1902
G. †Liroceras Teichert 1940
G. †Paranautilus Mojsisovics 1902
G. †Peripetoceras Hyatt 1894
G. †Permonautilus Kruglov 1933
G. †Potoceras Hyatt 1894
G. †Sibyllonautilus Diener 1915
Superfm. Nautilaceae de Blainville 1825
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Fm. Nautilidae de Blainville 1825
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G. †Carinonautilus Spengler 1910
G. †Cenoceras Hyatt 1884
G. †Eutrephoceras Hyatt 1894
G. Nautilus Linnaeus 1758
G. †Obinautilus Kobayashi 1954
G. †Pseudocenoceras Spath 1927
G. †Strionautilus Shimanskiy 1951
Superfm. †Tainocerataceae Hyatt 1883
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Fm. †Koninckioceratidae Hyatt in Zittel 1900
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G. †Edaphoceras Hyatt 1884
G. †Endolobus Meek and Worthen 1865
G. †Foordiceras Hyatt 1893
G. †Knightoceras Miller and Owen 1934
G. †Lophoceras Hyatt 1893
G. †Millkoninckioceras Kummel 1963
G. †Planetoceras Hyatt 1893
G. †Subvestinautilus Turner 1954
G. †Temnocheilus M'Coy 1844
G. †Tylodiscoceras Miller and Collinson 1950
Fm. †Rhiphaeoceratidae Ruzhentsev and Shimanskiy 1954
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G. †Pararhiphaeoceras Ruzhentsev and Shimanskiy 1954
G. †Rhiphaeoceras Ruzhentsev and Shimanskiy 1954
G. †Rhiphaeonautilus Ruzhentsev and Shimanskiy 1954
G. †Sholakoceras Ruzhentsev and Shimanskiy 1954
Fm. †Rutoceratidae Hyatt 1884
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G. †Adelphoceras Barrande 1870
G. †Anomaloceras Hyatt 1884
G. †Casteroceras Flower 1936
G. †Centrolitoceras Flower 1945
G. †Diademoceras Flower 1945
G. †Duerleyoceras Turner 1954
G. †Goldringia Flower 1945
G. †Halloceras Hyatt 1884
G. †Hercoceras Barrande 1865
G. †Hindeoceras Flower 1945
G. †Homoadelphoceras Foerste 1926
G. †Litogyroceras Teichert and Glenister 1952
G. †Muiroceras Flower 1949
G. †Pleuroncoceras Flower 1950
G. †Ptenoceras Hyatt 1894
G. †Ptyssoceras Hyatt 1894
G. †Roussanoffoceras Foerste 1925
G. †Rutoceras Hyatt 1884
G. †Syrreghmatoceras Sverbilova 1957
G. †Tetranodoceras Flower 1936
G. †Threaroceras Flower 1945
G. †Trochoceras Barrande in von Hauer 1848
G. †Tylorthoceras Miller 1932
Fm. †Tainoceratidae Hyatt 1883
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G. †Anoploceras Hyatt 1900
G. †Aulametacoceras Miller and Unklesbay 1942
G. †Cooperoceras Miller 1945
G. †Encoiloceras Hyatt in Zittel 1900
G. †Enoploceras Hyatt in Zittel 1900
G. †Germanonautilus von Mojsisovics 1902
G. †Gzheloceras Ruzhentsev and Shimanskiy 1954
G. †Hexagonites Hayasaka 1947
G. †Holconautilus Mojsisovics 1902
G. †Hunanoceras Zhao 1954
G. †Metacoceras Hyatt 1883
G. †Mojsvaroceras Hyatt 1883
G. †Parametacoceras Miller and Owen 1934
G. †Phaedrysmocheilus Shimansky and Erlanger 1955
G. †Phloioceras Hyatt 1884
G. †Pleuronautilus von Mojsisovics 1882
G. †Tainionautilus von Mojsisovics 1902
G. †Tainoceras Hyatt 1883
G. †Tanchiashanites Zhao 1954
G. †Thuringionautilus von Mojsisovics 1902
G. †Tirolonautilus von Mojsisovics 1902
G. †Trachynautilus Mojsisovics 1902
G. †Tylonautilus Pringle and Jackson 1928
Invalid names: Gyroceratidae von Mojsisovics 1882 [synonym], Gzheloceratidae Ruzhentsev and Shimanskiy 1954 [synonym]
Fm. †Tetragonoceratidae Flower 1945
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G. †Nassauoceras Miller 1932
G. †Tetragonoceras Whiteaves 1891
G. †Wellsoceras Flower 1945
Superfm. †Trigonocerataceae Hyatt 1884
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Fm. †Centroceratidae Hyatt in Zittel 1900
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G. †Carlloceras Flower and Caster 1935
G. †Centroceras Hyatt 1884
G. †Diorugoceras Hyatt 1893
G. †Homaloceras Whiteaves 1891
G. †Phacoceras Hyatt 1884
G. †Strophiceras Hyatt 1884
Fm. †Grypoceratidae Hyatt 1900
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G. †Domatoceras Hyatt 1891
G. †Epidomatoceras Turner 1954
G. †Grypoceras Hyatt 1883
G. †Gryponautilus Mojsisovics 1902
G. †Menuthionautilus Collignon 1933
G. †Paradomatoceras Delépine 1937
G. †Parastenopoceras Ruzhentsev and Shimanskiy 1954
G. †Pselioceras Hyatt 1884
G. †Stearoceras Hyatt 1893
G. †Stenopoceras Hyatt 1893
G. †Titanoceras Hyatt 1884
G. †Virgaloceras Schindewolf 1954
Fm. †Syringonautilidae Mojsisovics 1902
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G. †Clymenonautilus Hyatt in Zittel 1900
G. †Juvavionautilus Mojsisovics 1902
G. †Oxynautilus Mojsisovics 1902
G. †Syringoceras Hyatt 1894
G. †Syringonautilus Mojsisovics 1902
Fm. †Trigonoceratidae Hyatt 1884
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G. †Aphelaeceras Hyatt 1884
G. †Apogonoceras Ruzhentsev and Shimanskiy 1954
G. †Chouteauoceras Miller and Garner 1953
G. †Diodoceras Hyatt 1900
G. †Discitoceras Hyatt 1894
G. †Epistroboceras Turner 1954
G. †Leuroceras Hyatt 1893
G. †Lispoceras Hyatt 1893
G. †Maccoyoceras Miller et al. 1933
G. †Mesochasmoceras Foord 1900
G. †Pararineceras Turner 1954
G. †Rineceras Hyatt 1893
G. †Stroboceras Hyatt 1884
G. †Subclymenia d'Orbigny 1849
G. †Thrincoceras Hyatt 1893
G. †Vestinautilus Ryckholt 1852
Or. †Oncocerida Flower and Kummel, Jr. 1950
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Fm. †Brevicoceratidae Flower 1945
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G. †Aletoceras Flower 1938
G. †Anglicornus Flower and Caster 1935
G. †Blastocerina Flower 1940
G. †Brevicoceras Flower 1938
G. †Eleusoceras Flower 1938
G. †Exocyrtoceras Flower 1938
G. †Foersteoceras Ruedemann 1925
G. †Gonionaedyceras Flower 1945
G. †Gyronaedyceras Flower 1945
G. †Micronoceras Flower 1938
G. †Mitroceras Hyatt 1894
G. †Ovoceras Flower 1936
G. †Oxygonioceras Foerste 1925
G. †Stereotoceras Flower 1950
G. †Verticoceras Flower 1936
G. †Wissenbachia Foerste 1926
Or. †Orthocerida Kuhn 1940
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G. †Chicagooceras Foerste and Savage 1927
G. Dictyoceras Eichwald 1860
G. †Donacoceras Foerste 1925
G. †Garryoceras Foerste 1928
G. †Heloceras Eichwald 1860
G. †Loxoceras M'Coy 1844
G. †Molossus deMontfort 1808
G. †Neorthoceras Shimizu and Obata 1936
G. †Protobactrites Hyatt 1900
G. †Sannionites deWaldheim 1829
G. †Subspyroceras Shimizu and Obata 1935
G. †Tienoceras Zhao 1954
G. †Tretoceras Salter 1958
Or. †Tarphycerida Flower and Kummel, Jr. 1950
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Fm. †Lituitidae Philips 1848
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G. †Ancistroceras Remele 1881
G. †Angelinoceras Hyatt 1894
G. †Cyclolituites Remelé 1886
G. †Holmiceras Hyatt 1894
G. †Lituites Bertrand 1763
G. †Trilacinoceras Sweet 1958
G. †Tyrioceras Strand 1933
Invalid names: Gyroceras de Koninck 1844 [invalid subgroup]
Fm. †Neptunoceratidae Shimanskiy 1956
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G. †Neptunoceras Shimanskiy 1949
G. †Tetrapleuroceras Shimanskiy 1954
G. †Palaeoteuthis d'Orbigny 1849
G. †Rhyncholithes Blainville 1827
G. †Rhynchoteuthis d'Orbigny 1847
G. †Scaptorrhynchus Bellardi 1871
G. †Tillicheilus Shimanskiy 1947
Invalid names: Michelinoceratinae Flower 1945 [invalid subgroup]
Or. †Oncoceratida Flower and Kummel, Jr. 1950
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Fm. †Acleistoceratidae Flower 1950
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G. †Acleistoceras Hyatt 1884
G. †Amphicyrtoceras Foerste 1924
G. †Anomeioceras Foerste 1930
G. †Austinoceras Foerste 1934
G. †Byronoceras Foerste and Savage 1927
G. †Chadwickoceras Foerste 1930
G. †Clionyssiceras Foerste 1930
G. †Crateroceras Foerste and Savage 1927
G. †Ectocyrtoceras Foerste 1930
G. †Euryrizoceras Foerste 1935
G. †Galtoceras Foerste 1934
G. †Gonatocyrtoceras Foerste 1926
G. †Grimsbyoceras Foerste 1934
G. †Hercocyrtoceras Foerste 1927
G. †Paracleistoceras Foerste 1926
G. †Perioidanoceras Foerste 1930
G. †Poteriocerina Foerste 1926
G. †Rhomboceras Foerste 1934
G. †Slocomoceras Foerste 1930
G. †Streptoceras Billings 1866
G. †Tumidoceras Flower 1949
G. †Worthenoceras Foerste 1930
G. †Antonoceras Shimanskiy 1957
G. †Apioceras Fahrenkohl 1844
Fm. †Archiacoceratidae Teichert 1939
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G. †Archiacoceras Foerste 1926
G. †Cyrtoceratites Goldfuss 1830
G. †Devonocheilus Shimanskiy 1962
Fm. †Diestoceratidae Foerste 1926
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G. †Danoceras Troedsson 1926
G. †Diestoceras Foerste 1924
G. †Dowlingoceras Foerste 1928
G. †Lyckholmoceras Teichert 1930
G. †Suttonoceras Miller and Youngquist 1947
G. †Eudoceras Hyatt 1884
G. †Gomphoceras Sowerby 1839
Fm. †Hemiphragmoceratidae Foerste 1926
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G. †Conradoceras Foerste 1926
G. †Hemiphragmoceras Hyatt in Zittel 1900
G. †Hexameroceras Hyatt 1884
G. †Octamerella Teichert and Sweet 1962
G. †Tetrameroceras Hyatt 1884
Fm. †Jovellaniidae Foord 1888
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G. †Herkimeroceras Foerste 1926
G. †Jovellania Bayle 1879
G. †Laumontoceras Foerste 1926
G. †Mixosiphonoceras Hyatt 1900
G. †Projovellania Hyatt 1900
Fm. †Karoceratidae Teichert 1939
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G. †Karoceras Roussanoff 1909
G. †Osbornoceras Foerste 1936
G. †Shuranoceras Barskov 1959
G. †Nelimenia Laporte 1843
Fm. †Nothoceratidae Fischer 1882
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G. †Blakeoceras Foerste 1926
G. †Bolloceras Foerste 1926
G. †Conostichoceras Foerste 1926
G. †Lorieroceras Foerste 1926
G. †Metaphragmoceras Flower 1938
G. †Nothoceras Barrande 1856
G. †Paraconradoceras Foerste 1926
G. †Perimecoceras Foerste 1926
G. †Turnoceras Foerste 1926
Fm. †Oncoceratidae Hyatt 1884
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G. †Asaphiceras Foerste 1928
G. †Beloitoceras Foerste 1924
G. †Centrorizoceras Foerste 1930
G. †Digenuoceras Foerste 1935
G. †Dunleithoceras Foerste 1924
G. †Ehlersoceras Foerste 1932
G. †Ekwanoceras Foerste and Savage 1927
G. †Kentlandoceras Foerste 1932
G. †Loganoceras Foerste 1932
G. †Metarizoceras Foerste 1930
G. †Miamoceras Flower 1946
G. †Neumatoceras Foerste 1935
G. †Oncoceras Hall 1847
G. †Oocerina Foerste 1926
G. †Oonoceras Hyatt 1884
G. †Paroocerina Zhuravleva 1961
G. †Richardsonoceras Foerste 1932
G. †Rizoceras Hyatt 1884
G. †Romingoceras Foerste 1932
G. †Scofieldoceras Foerste 1932
G. †Vaupelia Flower 1946
G. †Zittelloceras Hyatt 1884
G. †Pachtoceras Foerste 1926
G. †Pictetoceras Foerste 1926
Fm. †Polyelasmoceratidae Shimanskiy 1956
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G. †Codoceras Hyatt 1900
G. †Coelocyrtoceras Foerste 1926
G. †Cyclopites Zhuravleva 1962
G. †Cyrtocheilus Shimanskiy 1962
G. †Danaoceras Foerste 1926
G. †Evlanoceras Zhuravleva 1962
G. †Hipparionoceras Flower 1945
G. †Macrodomoceras Teichert and Glenister 1952
G. †Turoceras Zhuravleva 1959
G. †Wadeoceras Teichert 1939
Fm. †Poterioceratidae Foord 1888
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G. †Argocheilus Shimanskiy 1961
G. †Cyrtogomphus Flower 1938
G. †Mecynoceras Foerste 1926
G. †Welleroceras Miller and Furnish 1938
G. †Xenoceras Flower 1952
G. †Sycoceras Pictet 1854
G. †Trigonodema Laporte 1843
Fm. †Trimeroceratidae Hyatt and Zittel 1900
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G. †Clathroceras Foerste 1926
G. †Eotrimeroceras Foerste 1928
G. †Inversoceras Hedström 1917
G. †Pentameroceras Hyatt 1884
G. †Stenogomphoceras Foerste 1930
G. †Trimeroceras Hyatt 1884
Fm. †Tripteroceratidae Flower 1941
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G. †Allumettoceras Foerste 1926
G. †Rasmussenoceras Foerste 1932
G. †Tripteroceras Hyatt 1884
G. †Tripterocerina Foerste 1935
Fm. †Valcouroceratidae Flower 1946
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G. †Actinomorpha Flower 1943
G. †Augustoceras Flower 1946
G. †Fayettoceras Foerste 1932
G. †Kindleoceras Foerste 1924
G. †Manitoulinoceras Foerste 1924
G. †Minganoceras Foerste 1938
G. †Staufferoceras Foerste 1932
G. †Valcouroceras Flower 1943
G. †Wetherbyoceras Foerste 1926
Or. †Tarphyceratida Flower and Kummel, Jr. 1950
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Fm. †Ophidioceratidae Hyatt 1894
Fm. †Trocholitidae Chapman 1857
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G. †Arkoceras Ulrich et al. 1942
G. †Beekmanoceras Ulrich and Foerste 1936
G. †Curtoceras Ulrich et al. 1942
G. †Discoceras Barrande 1867
G. †Graftonoceras Foerste 1925
G. †Hardmanoceras Teichert and Glenister 1952
G. †Jasperoceras Ulrich et al. 1942
G. †Litoceras Hyatt 1883
G. †Trocholites Conrad 1838
G. †Trocholitoceras Hyatt 1894
G. †Wichitoceras Ulrich et al. 1942
Subfm. †Spyroceratinae Shimizu and Obata 1935
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G. †Adnatoceras Flower 1939
G. †Allanoceras Barskov 1959
G. †Anastomoceras Flower 1939
G. †Cryptorthoceras Flower 1939
G. †Cyrtospyroceras Flower 1938
G. †Cyrtothoracoceras Turner 1964
G. †Diagoceras Flower 1936
G. †Dolorthoceras Miller 1931
G. †Eridites Zhuravleva 1961
G. †Euloxoceras Miller et al. 1933
G. †Fusicoceras Flower 1939
G. †Geisonoceroides Flower 1939
G. †Gordonoceras Teichert and Glenister 1953
G. †Lopingoceras Shimanskiy 1962
G. †Mitorthoceras Gordon 1960
G. †Palmeroceras Flower 1936
G. †Petryoceras Flower 1939
G. †Pseudocycloceras Barskov 1959
G. †Reticycloceras Gordon 1960
G. †Sceptrites Flower 1939
G. †Shikhanoceras Shimanskiy 1954
G. †Tripteroceroides Miller and Furnish 1940
Fm. †Bassleroceratidae Ulrich et al. 1944
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G. †Anguloceras Unklesbay and Young 1956
G. †Avoceras Sepkoski 2002
G. †Bassleroceras Ulrich and Foerste 1936
G. †Dwightoceras Ulrich and Foerste 1936
G. †Dyscritoceras Ulrich and Foerste 1936
Superfm. Nautilitaceae de Blainville 1825
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Fm. †Cymatoceratidae Spath 1927
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G. †Cymatonautilus Spath 1927
G. †Deltocymatoceras Kummel 1956
G. †Epicymatoceras Kummel 1956
G. †Eucymatoceras Spath 1927
G. †Heminautilus Spath 1927
G. †Paracymatoceras Spath 1927
G. †Procymatoceras Spath 1927
G. †Syrionautilus Spath 1927
Fm. †Hercoglossidae Spath 1927
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G. †Aturoidea Vredenburg 1925
G. †Cimomia Conrad 1866
G. †Deltoidonautilus Spath 1927
G. †Hercoglossa Conrad 1866
Fm. †Paracenoceratidae Spath 1927
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G. †Aulaconautilus Spath 1927
G. †Paracenoceras Spath 1927
G. †Somalinautilus Spath 1927
G. †Tithonoceras Retowski 1894
Fm. †Pseudonautilidae Shimansky and Erlanger 1955
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G. †Pseudonautilus Meek 1876
G. †Xenocheilus Shimansky 1957
Fm. †Proterocameroceratidae Kobayashi 1937
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G. †Anthoceras Teichert and Glenister 1954
G. †Campendoceras Teichert and Glenister 1954
G. †Clitendoceras Ulrich and Foerste 1936
G. †Cotteroceras Ulrich and Foerste 1936
G. †Cyptendoceras Ulrich and Foerste 1936
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Invalid names: Cyptendocerina Ulrich et al. 1944 [synonym]
G. †Escharendoceras Flower 1956
G. †Kirkoceras Ulrich and Foerste 1936
G. †Lobendoceras Teichert and Glenister 1954
G. †Lobosiphon Flower 1956
G. †Manitouoceras Ulrich et al. 1944
G. †Mcqueenoceras Ulrich and Foerste 1936
G. †Meniscoceras Flower 1941
G. †Mysticoceras Ulrich and Foerste 1936
G. †Oderoceras Ulrich et al. 1943
G. †Paraendoceras Ulrich and Foerste 1936
G. †Phragmosiphon Flower 1956
G. †Platysiphon Flower 1956
G. †Pliendoceras Flower 1956
G. †Proendoceras Flower 1955
G. †Proterocameroceras Ruedemann 1905
G. †Retroclitendoceras Flower 1956
G. †Stenosiphon Flower 1956
Fm. †Protocycloceratidae Kobayashi 1935
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G. †Apocrinoceras Teichert and Glenister 1954
G. †Catoraphinoceras Ulrich and Foerste 1936
G. †Diastoloceras Teichert and Glenister 1954
G. †Ectocycloceras Ulrich and Foerste 1936
G. †Endocycloceras Ulrich et al. 1944
G. †Kyminoceras Teichert and Glenister 1954
G. †Notocycloceras Teichert and Glenister 1954
G. †Protocycloceras Hyatt 1900
G. †Rudolfoceras Ulrich et al. 1944
G. †Vassaroceras Ulrich et al. 1944
G. †Walcottoceras Ulrich and Foerste 1936
Fm. †Piloceratidae Miller 1889
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G. †Allopiloceras Ulrich and Foerste 1936
G. †Cassinoceras Ulrich and Foerste 1936
G. †Piloceras Salter 1859
G. †Utoceras Ulrich et al. 1943
Fm. †Armenoceratidae Troedsson 1926
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G. †Armenoceras Foerste 1924
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Invalid names: Eushantungoceras Shimizu and Obata 1935 [synonym], Helenites Zhuravleva 1962 [synonym], Tunguskoceras [synonym]
G. †Cyrtonybyoceras Teichert 1933
G. †Elrodoceras Foerste 1924
G. †Megadiscosorus Foerste 1925
G. †Monocyrtoceras Foerste 1924
G. †Nybyoceras Troedsson 1926
G. †Selkirkoceras Foerste 1929
G. †Stolbovoceras Balashov 1962
Superfm. †Orthocerataceae M'Coy 1844
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Fm. †Geisonoceratidae Zhuravleva 1959
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G. †Columenoceras Barskov 1960
G. †Geisonoceras Hyatt 1884
G. †Harrisoceras Flower 1939
G. †Joachimoceras Barskov 1960
G. †Jonesoceras Barskov 1960
G. †Mesnaquaceras Flower 1955
G. †Protokionoceras Grabau and Shimer 1910
G. †Striacoceras Flower 1936
G. †Temperoceras Barskov 1960
G. †Virgoceras Flower 1939
Fm. †Paraphragmitidae Flower 1950
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G. †Calocyrtoceras Foerste 1936
G. †Cyrtocycloceras Foerste 1936
G. †Gaspocyrtoceras Foerste 1936
G. †Lyecoceras Mutvei 1957
G. †Paraphragmites Flower 1943
Fm. †Sactorthoceratidae Flower 1946
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G. †Centroonoceras Kobayashi 1934
G. †Sactorthoceras Kobayashi 1934
G. †Sigmocycloceras Kobayashi 1934
Fm. †Kionoceratinae Hyatt 1900
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G. †Kionoceras Hyatt 1884
G. †Ohioceras Shimizu and Obata 1935
G. †Parakionoceras Foerste 1928
G. †Polygrammoceras Foerste 1927
G. †Thoracoceras Fischer de Waldheim 1844
Fm. †Troedssonellidae Kobayashi 1935
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G. †Buttsoceras Ulrich and Foerste 1933
G. †Glenisteroceras Flower 1957
G. †Troedssonella Kobayashi 1935
G. †Wolungoceras Kobayashi 1931
Fm. †Lamellorthoceratidae Teichert 1961
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G. †Arthrophyllum Beyrich 1850
G. †Gorgonoceras Zhuravleva 1961
Fm. †Clinoceratidae Flower 1946
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G. †Clinoceras Mascke 1876
G. †Whiteavesites Foerste 1929
G. †Whitfieldoceras Foerste 1932
Superfm. †Pseudorthocerataceae Sweet 1964
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Fm. †Proteoceratidae Flower 1962
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G. †Cyrtactinoceras Hyatt in Zittel 1900
G. †Ephippiorthoceras Foerste 1924
G. †Gorbyoceras Shimizu and Obata 1935
G. †Isorthoceras Flower 1962
G. †Metephippiorthoceras Zhuravleva 1957
G. †Monomuchites Wilson 1961
G. †Proteoceras Flower 1955
G. †Stereospyroceras Flower 1955
G. †Tofangoceras Kobayashi 1927
Fm. †Pseudorthoceratidae Flower and Caster 1935
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Subfm. †Cayutoceratinae Flower 1939
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G. †Arpaoceras Zhuravleva 1962
G. †Bradfordoceras Flower and Caster 1935
G. †Cayutoceras Flower 1939
G. †Dnestroceras Zhuravleva 1961
G. †Metastromatoceras Zhuravleva 1957
G. †Stromatoceras Teichert and Glenister 1953
Subfm. †Pseudactinoceratinae Schindewolf 1943
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G. †Bergoceras Flower 1939
G. †Campyloceras M'Coy 1844
G. †Eusthenoceras Foord 1898
G. †Macroloxoceras Flower 1957
G. †Paraloxoceras Flower 1939
G. †Pseudactinoceras Schindewolf 1943
Subfm. †Pseudorthoceratinae Sweet 1964
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G. †Eifeloceras Foerste 1929
G. †Mooreoceras Miller et al. 1933
G. †Neocycloceras Flower and Caster 1935
G. †Pseudocyrtoceras Schindewolf 1943
G. †Pseudorthoceras Girty 1912
G. †Simorthoceras Shimanskiy 1954
G. †Uralorthoceras Shimanskiy 1951
Fm. †Hebetoceratidae Flower 1940
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G. †Ecdyceras Flower 1941
G. †Hebetoceras Flower 1941
G. †Montyoceras Flower 1941
Fm. †Graciloceratidae Flower in Flower and Kummel 1950
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G. †Eorizoceras Flower 1943
G. †Graciloceras Flower 1943
G. †Piersaloceras Teichert 1930
Fm. †Cyrtogomphoceratidae Flower 1940
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G. †Cyrtogomphoceras Foerste 1924
G. †Kiaeroceras Strand 1934
G. †Konglungenoceras Sweet 1959
G. †Landeroceras Foerste 1935
G. †Parryoceras Sweet and Miller 1957
G. †Strandoceras Flower 1946
G. †Ulrichoceras Foerste 1928
Fm. †Greenlandoceratidae Shimizu and Obata 1935
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G. †Greenlandoceras Shimizu and Obata 1935
Fm. †Tarphyceratidae Hyatt 1894
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G. †Campbelloceras Ulrich and Foerste 1936
G. †Centrotarphyceras Ulrich and Foerste 1936
G. †Cycloplectoceras Ulrich et al. 1942
G. †Eurystomites Schröder 1891
G. †Moreauoceras Cullison 1944
G. †Pilotoceras Cullison 1944
G. †Pionoceras Ulrich et al. 1942
G. †Seelyoceras Ulrich and Foerste 1936
G. †Tarphyceras Hyatt 1894
Fm. †Estonioceratidae Hyatt 1900
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G. †Aethoceras Teichert and Glenister 1954
G. †Alaskoceras Miller and Kummel 1945
G. †Aphetoceras Hyatt 1894
G. †Clytoceras
G. †Eichwaldoceras Balashov 1955
G. †Estonioceras Noetling 1883
G. †Pycnoceras Hyatt 1894
G. †Shumardoceras Ulrich and Foerste 1936
G. †Tragoceras Remelé 1890
Fm. †Ophidoceratidae Hyatt 1894
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Subor. †Cyrtocerinina Flower 1964
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Fm. †Bathmoceratidae Gill 1871
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G. †Bathmoceras Barrande 1865
G. †Eothinoceras Ulrich et al. 1944
Subfm. †Orthoceratinae McCoy 1844
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G. †Bifoveoceras Balashov 1956
G. †Ctenoceras Noetling 1884