Classification of Evans 1996

Subcl. Nautiloidea Agassiz 1847 [nautiloid]
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Or. †Orthocerida Kuhn 1940
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Subor. †Orthocerataceae M'Coy 1844
Superfm. †Orthocerataceae M'Coy 1844
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Fm. †Geisonoceratidae Zhuravleva 1959
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G. †Ugooloceras Evans 1996
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†Ugooloceras oblatum Evans 1996