Classification of Ulrich et al. 1943
Fm. †Cyclostomiceratidae Foerste 1925
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G. †Buehleroceras Ulrich et al. 1943
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†Buehleroceras apertum Ulrich et al. 1943
†Buehleroceras compressum Ulrich et al. 1943
G. †Cyclostomiceras Hyatt 1900
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†Cyclostomiceras cassinense Whitfield 1886
†Cyclostomiceras minimum Whitfield 1886
†Cyclostomiceras vasiforme Dwight 1884
Fm. †Piloceratidae Miller 1889
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G. †Allopiloceras Ulrich and Foerste 1936
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†Allopiloceras affine Ulrich et al. 1943
†Allopiloceras baylorense Ulrich et al. 1943
†Allopiloceras breve Ulrich et al. 1943
†Allopiloceras canadense Billings 1860
†Allopiloceras coarctum Foerste 1938
†Allopiloceras compressum Ulrich et al. 1943
†Allopiloceras erectum Ulrich et al. 1943
†Allopiloceras sevierense Ulrich et al. 1943
†Allopiloceras subrectum Ulrich et al. 1943
†Allopiloceras subunguliforme Ulrich et al. 1943
†Allopiloceras unguliforme Ulrich et al. 1943
G. †Cassinoceras Ulrich and Foerste 1936
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†Cassinoceras amplum Dawson 1881
†Cassinoceras triton Billings 1865
†Cassinoceras wortheni Billings 1865
G. †Kirkoceras Ulrich and Foerste 1936
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†Kirkoceras bradleyi Ulrich et al. 1943
†Kirkoceras compressum Ulrich et al. 1943
†Kirkoceras gracile Ulrich et al. 1943
†Kirkoceras missisquoi Billings 1865
†Kirkoceras obliquum Ulrich et al. 1943
G. †Oderoceras Ulrich et al. 1943
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†Oderoceras depressum Ulrich et al. 1943
†Oderoceras edax Billings 1865
†Oderoceras sevierense Ulrich et al. 1943
†Oderoceras virginianum Ulrich et al. 1943
G. †Utoceras Ulrich et al. 1943
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†Utoceras coloradense Ulrich et al. 1943
†Utoceras gleneyriense Ulrich et al. 1943
Fm. †Cyrtendoceratidae Hyatt 1900
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G. †Burenoceras Ulrich and Foerste 1931
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†Burenoceras angulare Ulrich et al. 1943
†Burenoceras compressum Ulrich et al. 1943
†Burenoceras curticei Ulrich et al. 1943
†Burenoceras dickhauti Ulrich et al. 1943
†Burenoceras dilatatum Ulrich et al. 1943
†Burenoceras huzzahense Ulrich et al. 1943
†Burenoceras minor Ulrich et al. 1943
†Burenoceras oneotense Ulrich et al. 1943
†Burenoceras peramplum Ulrich et al. 1943
†Burenoceras percompressum Ulrich et al. 1943
†Burenoceras planiseptatum Ulrich et al. 1943
†Burenoceras pumilum Ulrich et al. 1943
†Burenoceras texanum Ulrich et al. 1943
†Burenoceras undosum Ulrich et al. 1943
†Burenoceras ungulatum Ulrich et al. 1943
G. †Caseoceras Ulrich et al. 1943
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†Caseoceras conicum Ulrich et al. 1943
†Caseoceras contractum Ulrich et al. 1943
†Caseoceras holtedahli Foerste 1921
†Caseoceras intermedium Ulrich et al. 1943
†Caseoceras nitidum Ulrich et al. 1943
†Caseoceras sequatchiense Ulrich et al. 1943
†Caseoceras subconicum Ulrich et al. 1943
G. †Clarkoceras Ruedemann 1905
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†Clarkoceras affine Ulrich et al. 1943
†Clarkoceras arcuatum Ulrich et al. 1943
†Clarkoceras buttsi Ulrich et al. 1943
†Clarkoceras calvini Ulrich et al. 1943
†Clarkoceras cinctum Ulrich et al. 1943
†Clarkoceras clelandi Ulrich et al. 1943
†Clarkoceras confertum Ulrich et al. 1943
†Clarkoceras corniculum Sardeson 1896
†Clarkoceras crassum Ulrich et al. 1943
†Clarkoceras cuneatum Ulrich et al. 1943
†Clarkoceras curvatum Ulrich et al. 1943
†Clarkoceras expansum Ulrich et al. 1943
†Clarkoceras gracile Ulrich et al. 1943
†Clarkoceras huzzahense Ulrich et al. 1943
†Clarkoceras inconstans Ulrich et al. 1943
†Clarkoceras jasperense Ulrich et al. 1943
†Clarkoceras lawrencense Ulrich et al. 1943
†Clarkoceras levisense Ulrich et al. 1943
†Clarkoceras luthei Ulrich et al. 1943
†Clarkoceras magnisiphonatum Ulrich et al. 1943
†Clarkoceras minneiskense Ulrich et al. 1943
†Clarkoceras modestum Ulrich et al. 1943
†Clarkoceras mohawkense Ulrich et al. 1943
†Clarkoceras multicameratum Ulrich et al. 1943
†Clarkoceras newtonwinchelli Clarke 1897
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Invalid names: Clarkoceras claytonense Powell 1935 [synonym]
†Clarkoceras parvisiphonatum Ulrich et al. 1943
†Clarkoceras rectum Ulrich et al. 1943
†Clarkoceras ruguliferum Ulrich et al. 1943
†Clarkoceras subarcuatum Ulrich et al. 1943
†Clarkoceras subcrassum Ulrich et al. 1943
†Clarkoceras subrectum Ulrich et al. 1943
†Clarkoceras vicinum Ulrich et al. 1943
†Clarkoceras whitehallense Ulrich et al. 1943
G. †Conocerina Ulrich and Foerste 1936
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†Conocerina arrecta Ulrich et al. 1943
†Conocerina bassleri Ulrich et al. 1943
†Conocerina beani Ulrich et al. 1943
†Conocerina magna Ulrich et al. 1943
†Conocerina missouriensis Ulrich et al. 1943
†Conocerina obliqua Ulrich et al. 1943
†Conocerina raaschi Ulrich et al. 1943
†Conocerina sublonga Ulrich et al. 1943
G. †Cumberloceras Ulrich et al. 1943
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†Cumberloceras buttsi Ulrich et al. 1943
†Cumberloceras elwayense Ulrich et al. 1943
G. †Cyrtendoceras Remelé 1886
G. †Dakeoceras Ulrich and Foerste 1931
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†Dakeoceras corniculum Ulrich et al. 1943
†Dakeoceras dilatatum Ulrich et al. 1943
†Dakeoceras divergens Ulrich et al. 1943
†Dakeoceras magnisiphonatum Ulrich et al. 1943
†Dakeoceras perretrorsum Ulrich et al. 1943
†Dakeoceras retrorsum Ulrich et al. 1943
†Dakeoceras reversum Ulrich et al. 1943
†Dakeoceras undulatum Ulrich et al. 1943
G. †Ectenoceras Ulrich and Foerste 1936
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†Ectenoceras arbucklense Ulrich et al. 1943
†Ectenoceras arcuosutum Ulrich et al. 1943
†Ectenoceras curvatum Kobayashi 1931
†Ectenoceras ellipticum Ulrich et al. 1943
†Ectenoceras gracile Cleland 1903
†Ectenoceras higdonense Ulrich et al. 1943
†Ectenoceras laqueatum Ulrich et al. 1943
†Ectenoceras millsi Ulrich et al. 1943
†Ectenoceras obliquum Ulrich et al. 1943
†Ectenoceras pergracile Ulrich et al. 1943
†Ectenoceras perobliquum Ulrich et al. 1943
†Ectenoceras subcurvatum Ulrich et al. 1943
†Ectenoceras subgracile Ulrich and Foerste 1936
G. †Eremoceras Hyatt 1884
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†Eremoceras conoidale Ulrich et al. 1943
†Eremoceras difficile Ulrich et al. 1943
†Eremoceras gasconadense Ulrich et al. 1943
†Eremoceras luthei Ulrich et al. 1943
†Eremoceras marylandicum Ulrich et al. 1943
†Eremoceras perdilatum Ulrich et al. 1943
†Eremoceras subrectum Ulrich et al. 1943
†Eremoceras syphax Billings 1865
†Eremoceras vernonense Ulrich et al. 1943
G. †Levisoceras Foerste 1925
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†Levisoceras arctedorsatum Ulrich et al. 1943
†Levisoceras belli Ulrich et al. 1943
†Levisoceras complanatum Ulrich et al. 1943
†Levisoceras constrictum Ulrich et al. 1943
†Levisoceras curvatum Ulrich et al. 1943
†Levisoceras edwardsi Ulrich et al. 1943
†Levisoceras mercurius Billings 1865
†Levisoceras obliquatum Ulrich et al. 1943
†Levisoceras percurvatum Ulrich et al. 1943
†Levisoceras raaschi Ulrich et al. 1943
†Levisoceras subgracile Ulrich et al. 1943
G. †Mcqueenoceras Ulrich and Foerste 1936
G. †Oneotoceras Ulrich 1926
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†Oneotoceras curvatum Ulrich et al. 1943
†Oneotoceras divaricatum Ulrich et al. 1943
†Oneotoceras extremum Ulrich et al. 1943
†Oneotoceras husseyi Ulrich et al. 1943
†Oneotoceras impressum Ulrich et al. 1943
†Oneotoceras loculosum Hall 1861
†Oneotoceras madisonense Ulrich et al. 1943
†Oneotoceras magnum Ulrich et al. 1943
†Oneotoceras percurvatum Ulrich et al. 1943
†Oneotoceras wisconsinense Ulrich et al. 1943
G. †Shelbyoceras Ulrich et al. 1931
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†Shelbyoceras bessemerense Ulrich et al. 1943
†Shelbyoceras buttsi Ulrich et al. 1943
†Shelbyoceras unguliforme Ulrich et al. 1943
Fm. †Beekmanoceratidae Ulrich et al. 1943
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