Classification of Sweet 1958

Cl. Cephalopoda Cuvier 1797
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Subcl. Nautiloidea Agassiz 1847 [nautiloid]
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Subor. †Actinoceratina Flower 1950
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Fm. †Armenoceratidae Troedsson 1926
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G. †Nybyoceras Troedsson 1926
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†Nybyoceras holmi Sweet 1958
Fm. †Ormoceratidae Saeman 1853
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G. †Ormoceras Stokes 1840
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†Ormoceras kiaeri Sweet 1958
Invalid names: Lambeoceratidae Flower 1957 [empty]
Subor. †Endoceratina Flower 1950
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Fm. †Endoceratidae Hyatt 1884
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G. †Cyrtendoceras Remelé 1886
G. †Dideroceras Flower 1950
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G. †Endoceras Hall 1847
G. †Vaginoceras Hyatt 1884
Invalid names: Ellesmeroceratina Flower 1950 [empty]
G. †Hoeloceras Sweet 1958
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†Hoeloceras askeri Sweet 1958
†Hoeloceras helgoeyense Sweet 1958
Or. Nautiloidea Agassiz 1847 [nautiloid]
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Invalid names: Ascoceratina Flower 1950 [empty], Discosorina Flower 1940 [empty], Michelinoceratina Flower 1950 [empty], Oncoceratina Flower 1950 [empty], Tarphyceratina Flower 1950 [empty]
†Discoceras boreale Sweet 1958
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