Classification of Ulrich and Scofield 1897
G. †Helcionopsis Ulrich and Scofield 1897
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†Helcionopsis radiata Lindström 1884
†Helcionopsis striata Ulrich and Scofield 1897
†Helcionopsis subcarinata Ulrich and Scofield 1897
G. †Tryblidium Angelin and Lindström 1880
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†Tryblidium erato Billings 1865
†Tryblidium hyrie Billings 1865
†Tryblidium modestum Ulrich and Scofield 1897
†Tryblidium nycteis Billings 1865
†Tryblidium unguis Angelin and Lindström 1880
G. †Cyrtolites Conrad 1838
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†Cyrtolites carinatus Miller 1874
†Cyrtolites dilatus Ulrich and Scofield 1897
†Cyrtolites disjunctus Ulrich and Scofield 1897
†Cyrtolites parvus Ulrich and Scofield 1897
†Cyrtolites retrorsus Ulrich and Scofield 1897
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†Cyrtolites retrorsus fillmorensis Ulrich and Scofield 1897
†Cyrtolites subplanus Ulrich and Scofield 1897
G. †Scenella Billings 1872
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†Scenella affinis Ulrich and Scofield 1897
†Scenella beloitensis Ulrich and Scofield 1897
†Scenella compressa Ulrich and Scofield 1897
†Scenella conicum Whitfield 1886
†Scenella exserta Sardeson 1892
†Scenella magnifica Ulrich and Scofield 1897
†Scenella montrealensis Billings 1865
†Scenella obtusa Sardeson 1892
†Scenella radialis Ulrich and Scofield 1897
†Scenella superba Billings 1865
G. †Bucanopsis Ulrich and Scofield 1897
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†Bucanopsis carinifera Ulrich and Scofield 1897
†Bucanopsis gemma Lindström 1884
†Bucanopsis kansasensis Shumard 1858
†Bucanopsis latevittatus Lindström 1884
†Bucanopsis leda Hall 1859
†Bucanopsis marcouiana Geinitz 1866
†Bucanopsis meekana Shumard and Swallow 1858
†Bucanopsis textilis Miller 1877
G. †Tetranota Ulrich and Scofield 1897
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†Tetranota bidorsata Hall 1847
†Tetranota macra Ulrich and Scofield 1897
†Tetranota obsoleta Ulrich and Scofield 1897
†Tetranota sexcarinata Ulrich and Scofield 1897
†Tetranota wisconsinensis Whitfield 1878
G. †Archinacella Ulrich and Scofield 1897
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†Archinacella canadense Whiteaves 1884
†Archinacella cingulata Ulrich and Scofield 1897
†Archinacella deleta Sardeson 1892
†Archinacella depressa Ulrich and Scofield 1897
†Archinacella estella Billings 1865
†Archinacella instabilis Billings 1865
†Archinacella patelliformis Hall 1847
†Archinacella perovalis Whitfield 1878
†Archinacella piliolum Whitfield 1889
†Archinacella powersi Ulrich and Scofield 1897
†Archinacella richmondensis Ulrich and Scofield 1897
†Archinacella rotunda Ulrich and Scofield 1897
†Archinacella rugatina Ulrich and Scofield 1897
†Archinacella semicarinata Ulrich and Scofield 1897
†Archinacella simplex Billings 1865
†Archinacella simulatrix Ulrich and Scofield 1897
†Archinacella subcarinata Ulrich and Scofield 1897
†Archinacella subrotunda Ulrich and Scofield 1897
†Archinacella trentonensis Billings 1865
†Archinacella valida Sardeson 1892
G. †Coelocaulus Oehlert and Oehlert 1888
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†Coelocaulus compressa Lindström 1884
†Coelocaulus fascinata Ulrich and Scofield 1897
†Coelocaulus linearis Billings 1859
†Coelocaulus logani Hall 1852
†Coelocaulus longispira Hall 1852
†Coelocaulus neglectus Ulrich and Scofield 1897
†Coelocaulus oehlerti Ulrich and Scofield 1897
†Coelocaulus turritiformis Hall 1852
G. †Gyronema Ulrich and Scofield 1897
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†Gyronema duplicatum Ulrich and Scofield 1897
†Gyronema liratum Ulrich and Scofield 1897
†Gyronema pericarinatum Hall 1847
†Gyronema pulchellum Ulrich and Scofield 1897
†Gyronema semicarinatum Salter 1859
G. †Murchisonia d'Archiac and de Verneuil 1841
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†Murchisonia teretiformis Billings 1857
G. †Kokenia Holzapfel 1895
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†Kokenia costalis Ulrich and Scofield 1897
†Kokenia esthona Koken 1889
Fm. †Bellerophontidae M'Coy 1851
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G. †Bellerophon de Montfort 1808
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†Bellerophon bilineatus Ulrich and Scofield 1897
†Bellerophon capax Ulrich and Scofield 1897
†Bellerophon clausus Ulrich and Scofield 1897
†Bellerophon miser Billings 1865
†Bellerophon mohri Miller 1874
†Bellerophon platystoma Meek and Worthen 1868
†Bellerophon recurvus Ulrich and Scofield 1897
†Bellerophon rugosus Emmons 1855
†Bellerophon similis Ulrich and Scofield 1897
†Bellerophon subangularis Ulrich and Scofield 1897
†Bellerophon subglobulus Ulrich and Scofield 1897
†Bellerophon troosti de Ferrusac and d'Orbigny 1840
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†Bellerophon troosti burginensis Ulrich and Scofield 1897
†Bellerophon tubulosa Lindström 1884
G. †Euphemites Warthin 1930
G. †Mogulia Waagen 1880
G. †Patellostium Waagen 1880
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†Patellostium montfortianum Norwood and Pratten 1855
†Patellostium newberryi Meek 1871
†Patellostium patulus Hall 1843
†Patellostium rudis Hall 1860
†Patellostium triliratus Hall 1879
G. †Stachella Waagen 1880
G. †Warthia Waagen 1880
Superfm. †Bellerophontacea M'Coy 1851
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Fm. †Carinaropsidae Ulrich and Scofield 1897
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G. †Carinaropsis Hall 1847
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†Carinaropsis acuta Ulrich and Scofield 1897
†Carinaropsis cunulae Hall 1861
†Carinaropsis cymbula Hall 1861
†Carinaropsis explanata Ulrich and Scofield 1897
†Carinaropsis minima Ulrich and Scofield 1897
†Carinaropsis phalera Sardeson 1892
G. †Pterotheca Salter 1853
Fm. †Loxonematidae Koken 1889
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G. †Meekospira Ulrich and Scofield 1897
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†Meekospira antiqua Goldfuss 1844
†Meekospira bulima Lindström 1884
†Meekospira cancellata Lindström 1884
†Meekospira fenestrata Lindström 1884
†Meekospira inornata Meek and Worthen 1866
†Meekospira louisvillae Hall and Whitfield 1872
†Meekospira nitidula Meek and Worthen 1860
†Meekospira peracuta Meek and Worthen 1860
†Meekospira planilateralis Foerste 1893
†Meekospira subconica Ulrich and Scofield 1897
Fm. †Subulitidae Lindström 1884
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G. †Cyrtospira Ulrich and Scofield 1897
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†Cyrtospira abbreviatus Hall 1852
†Cyrtospira bicurvata Ulrich and Scofield 1897
†Cyrtospira brevis Winchell and Marcy 1866
†Cyrtospira notata Billings 1866
†Cyrtospira parvulus Billings 1865
†Cyrtospira tortilis Ulrich and Scofield 1897
†Cyrtospira ventricosus Hall 1852
†Cyrtospira wykoffensis Ulrich and Scofield 1897
G. †Fusispira Hall 1872
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†Fusispira calciferus Billings 1859
†Fusispira convexa Ulrich and Scofield 1897
†Fusispira daphne Billings 1865
†Fusispira inflata Meek and Worthen 1870
†Fusispira intermedia Ulrich and Scofield 1897
†Fusispira planulata Ulrich and Scofield 1897
†Fusispira psyche Billings 1865
†Fusispira schucherti Ulrich and Scofield 1897
†Fusispira subfusiformis Hall 1847
†Fusispira sulcata Ulrich and Scofield 1897
G. †Subulites Emmons 1842
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†Subulites beloitensis Ulrich and Scofield 1897
†Subulites canadensis Ulrich and Scofield 1897
†Subulites compactus Whiteaves 1884
†Subulites conradi Ulrich and Scofield 1897
†Subulites directus Foerste 1893
†Subulites dixonenesis Ulrich and Scofield 1897
†Subulites nanus Ulrich and Scofield 1897
†Subulites parvus Ulrich and Scofield 1897
†Subulites pergracilis Ulrich and Scofield 1897
†Subulites regularis Ulrich and Scofield 1897
†Subulites richardsoni Billings 1857
†Subulites terebriformis Hall and Whitfield 1875
Fm. †Maclureadae Carpenter 1861
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G. †Maclurea Le Sueur 1818
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†Maclurea bigsbyi Hall 1861
†Maclurea crenulata Billings 1865
†Maclurea depressa Ulrich and Scofield 1897
†Maclurea knoxvillensis Ulrich and Scofield 1897
†Maclurea magnus Le Sueur 1818
†Maclurea nitida Ulrich and Scofield 1897
G. †Maclurina Ulrich and Scofield 1897
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†Maclurina cuneata Whitfield 1878
†Maclurina manitobensis Whiteaves 1890
†Maclurina subrotunda Whitfield 1878
Fm. †Trochonematidae von Zittel 1895
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G. †Craspedostoma Lindström 1884
G. †Cyclonema Hall 1852
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†Cyclonema bilix Conrad 1842
†Cyclonema cancellatum Angelin and Lindström 1880
†Cyclonema gracile Ulrich and Scofield 1897
†Cyclonema humerosum Ulrich and Scofield 1897
†Cyclonema inflatum Ulrich and Scofield 1897
†Cyclonema mediale Ulrich and Scofield 1897
†Cyclonema mollis Lindström 1884
†Cyclonema simulans Ulrich and Scofield 1897
†Cyclonema sublaeve Ulrich and Scofield 1897
†Cyclonema transversum Ulrich and Scofield 1897
†Cyclonema varicosum Hall 1861
G. †Holopea Hall 1847
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†Holopea ampla Ulrich and Scofield 1897
†Holopea appressa Ulrich and Scofield 1897
†Holopea concinnula Ulrich and Scofield 1897
†Holopea excelsa Ulrich and Scofield 1897
†Holopea insignis Ulrich and Scofield 1897
†Holopea paludiniformis Hall 1847
†Holopea parvula Ulrich and Scofield 1897
†Holopea pyrene Billings 1865
†Holopea rotunda Ulrich and Scofield 1897
†Holopea similis Ulrich and Scofield 1897
†Holopea subtilis Ulrich and Scofield 1897
†Holopea supraplana Ulrich and Scofield 1897
G. †Strophostylus Hall 1859
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†Strophostylus delicatula Lindström 1884
†Strophostylus textilis Miller 1897
G. †Trochonema Salter 1859
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†Trochonema altum Ulrich and Scofield 1897
†Trochonema beachi Whitfield 1878
†Trochonema bellulum Ulrich and Scofield 1897
†Trochonema beloitense Whitfield 1878
†Trochonema dalli Lindström 1884
†Trochonema eccentricum Ulrich and Scofield 1897
†Trochonema fragile Ulrich and Scofield 1897
†Trochonema fulminatus Lindström 1884
†Trochonema lamellosus Lindström 1884
†Trochonema madisonense Ulrich and Scofield 1897
†Trochonema niota Hall 1861
†Trochonema retrorsum Ulrich and Scofield 1897
†Trochonema rugosum Ulrich and Scofield 1897
†Trochonema subcrassum Ulrich and Scofield 1897
†Trochonema vagrans Ulrich and Scofield 1897
†Trochonema wisbyensis Lindström 1884
Fm. Capulidae Fleming 1822
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G. †Platyceras Conrad 1840
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†Platyceras depressum Ulrich and Scofield 1897
†Platyceras wisconsinense Ulrich and Scofield 1897
G. †Euphemus M'Coy 1844
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†Euphemus carbonarius Cox 1857
†Euphemus nodocarinatus Hall 1858
Fm. †Euomphalidae White 1877
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G. †Discohelix Dunker 1847
G. †Eccyliomphalus Portlock 1843
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†Eccyliomphalus angelini Lindström 1884
†Eccyliomphalus calciferus Whitfield 1889
†Eccyliomphalus canadensis Billings 1861
†Eccyliomphalus contiguus Ulrich and Scofield 1897
†Eccyliomphalus distans Billings 1865
†Eccyliomphalus intortus Billings 1861
†Eccyliomphalus lituiformis Whitfield 1886
†Eccyliomphalus quebecensis Billings 1865
†Eccyliomphalus subrotundus Ulrich and Scofield 1897
†Eccyliomphalus undulatus Hall 1861
G. †Eccyliopterus Remelé 1888
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†Eccyliopterus alatus Roemer 1876
†Eccyliopterus beloitensis Ulrich and Scofield 1897
†Eccyliopterus hortensia Billings 1865
†Eccyliopterus marginale d'Eichwald 1860
†Eccyliopterus ottawaensis Billings 1860
†Eccyliopterus owenanus Meek and Worthen 1868
†Eccyliopterus replicata Angelin and Lindström 1880
†Eccyliopterus spirillum Koken 1896
†Eccyliopterus volutatus Whitfield 1886
G. †Euomphalus Sowerby 1814
G. †Helicotoma Salter 1859
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†Helicotoma declivis Safford 1869
†Helicotoma eucharis Billings 1865
†Helicotoma gorgonia Billings 1865
†Helicotoma granosa Ulrich and Scofield 1897
†Helicotoma marginata Ulrich and Scofield 1897
†Helicotoma miser Billings 1865
†Helicotoma perstriata Billings 1859
†Helicotoma planulata Salter 1859
†Helicotoma planulatoides Ulrich and Scofield 1897
†Helicotoma proserpina Billings 1865
†Helicotoma robusta Ulrich and Scofield 1897
†Helicotoma spinosa Salter 1859
†Helicotoma subquadrata Ulrich and Scofield 1897
†Helicotoma tennesseensis Safford 1869
†Helicotoma tritonia Billings 1865
†Helicotoma umbilicata Ulrich and Scofield 1897
†Helicotoma verticalis Ulrich and Scofield 1897
G. †Ophiletina Ulrich and Scofield 1897
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†Ophiletina angularis Ulrich and Scofield 1897
†Ophiletina sublaxa Ulrich and Scofield 1897
Superfm. †Eotomacea Ulrich and Scofield 1897
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Fm. Pleurotomariidae Swainson 1840
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G. †Bembexia Oehlert and Oehlert 1888
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†Bembexia adjutor Hall 1859
†Bembexia elegantula Hall 1856
†Bembexia nitella Hall 1860
†Bembexia planidorsalis Hall 1876
†Bembexia shumardi Meek and Worthen 1860
†Bembexia sulcomarginata Conrad 1842
G. †Clathrospira Ulrich and Scofield 1897
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†Clathrospira claustrata Lindström 1884
†Clathrospira conica Ulrich and Scofield 1897
†Clathrospira convexa Ulrich and Scofield 1897
†Clathrospira glandiformis Lindström 1884
†Clathrospira hindei Lindström 1884
†Clathrospira latezonata Lindström 1884
†Clathrospira subconica Hall 1847
G. †Eotomaria Ulrich and Scofield 1897
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†Eotomaria canalifera Ulrich and Scofield 1897
†Eotomaria dryope Billings 1865
†Eotomaria elevata Ulrich and Scofield 1897
†Eotomaria labiosa Ulrich and Scofield 1897
†Eotomaria vicina Ulrich and Scofield 1897
G. †Euconia Ulrich and Scofield 1897
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†Euconia amphitrite Billings 1865
†Euconia etna Billings 1865
†Euconia ramseyi Billings 1859
G. †Euconospira Ulrich and Scofield 1897
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†Euconospira missouriensis Swallow 1860
†Euconospira turbiniformis Meek and Worthen 1860
G. †Liospira Ulrich and Scofield 1897
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†Liospira abrupta Ulrich and Scofield 1897
†Liospira americana Billings 1860
†Liospira angulata Ulrich and Scofield 1897
†Liospira angustata Ulrich and Scofield 1897
†Liospira decipens Ulrich and Scofield 1897
†Liospira docens Billings 1859
†Liospira eugenia Billings 1865
†Liospira helena Billings 1860
†Liospira kokeni Koken 1889
†Liospira larvata Salter 1859
†Liospira micula Hall and Whitney 1862
†Liospira modesta Ulrich and Scofield 1897
†Liospira mundula Ulrich and Scofield 1897
†Liospira numeria Billings 1865
†Liospira obtusa Ulrich and Scofield 1897
†Liospira persimilis Ulrich and Scofield 1897
†Liospira praevium Whitfield 1889
†Liospira progne Billings 1860
†Liospira rugata Ulrich and Scofield 1897
†Liospira subconcava Ulrich and Scofield 1897
†Liospira vitruvia Billings 1865
G. †Lophospira Whitfield 1886
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†Lophospira abnormis Ulrich and Scofield 1897
†Lophospira acuminata Ulrich and Scofield 1897
†Lophospira ampla Ulrich and Scofield 1897
†Lophospira aspera Billings 1859
†Lophospira bowdeni Safford 1869
†Lophospira cancellata Lindström 1884
†Lophospira cancellatula Sedgwick and M'Coy 1855
†Lophospira centralis Ulrich and Scofield 1897
†Lophospira cicelia Billings 1865
†Lophospira cochleata Lindström 1884
†Lophospira concinnula Ulrich and Scofield 1897
†Lophospira conoidea Ulrich and Scofield 1897
†Lophospira conradana Ulrich and Scofield 1897
†Lophospira decursa Ulrich and Scofield 1897
†Lophospira elevata Ulrich and Scofield 1897
†Lophospira estella Billings 1865
†Lophospira extenuata Hall 1859
†Lophospira fillmorensis Ulrich and Scofield 1897
†Lophospira gothlandica Ulrich and Scofield 1897
†Lophospira gradata Lindström 1884
†Lophospira gyrogonia M'Coy 1851
†Lophospira helicteres Salter 1859
†Lophospira holmi Lindström 1884
†Lophospira humilis Ulrich and Scofield 1897
†Lophospira imbricata Lindström 1884
†Lophospira knoxvillensis Ulrich and Scofield 1897
†Lophospira laqueata Lindström 1884
†Lophospira lirata Ulrich and Scofield 1897
†Lophospira macrospira Hall 1852
†Lophospira major Hall 1852
†Lophospira medialis Ulrich and Scofield 1897
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†Lophospira medialis burginensis Ulrich and Scofield 1897
†Lophospira modesta Billings 1857
†Lophospira munda Lindström 1884
†Lophospira notablis Ulrich and Scofield 1897
†Lophospira obliqua Ulrich and Scofield 1897
†Lophospira oweni Ulrich and Scofield 1897
†Lophospira peracuta Ulrich and Scofield 1897
†Lophospira perangulata Hall 1847
†Lophospira perforata Ulrich and Scofield 1897
†Lophospira perlamellosus Ulrich and Scofield 1897
†Lophospira procera Ulrich and Scofield 1897
†Lophospira producta Ulrich and Scofield 1897
†Lophospira pulchella Ulrich and Scofield 1897
†Lophospira pulchra M'Coy 1844
†Lophospira quadrisulcata Ulrich and Scofield 1897
†Lophospira saffordi Ulrich and Scofield 1897
†Lophospira scutulata Lindström 1884
†Lophospira serrulata Salter 1859
†Lophospira sororcula Billings 1865
†Lophospira spironema Ulrich and Scofield 1897
†Lophospira sumnerensis Safford 1869
†Lophospira tenuistriata Ulrich and Scofield 1897
†Lophospira tortuosa Lindström 1884
†Lophospira tricarinata Hall 1847
†Lophospira trilix Hall 1862
†Lophospira trochonemoides Ulrich and Scofield 1897
†Lophospira tropidophora Meek 1873
†Lophospira tubulosa Lindström 1884
†Lophospira ventricosa Hall 1847
†Lophospira wisconsinensis Ulrich and Scofield 1897
Subg. †Murchisonia (Hormotoma) Salter 1859
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†Hormotoma anna Billings 1859
†Hormotoma attenuata Lindström 1884
†Hormotoma bellicincta Hall 1847
†Hormotoma cingulata Hisinger 1829
†Hormotoma desiderata Hall 1859
†Hormotoma egregia Billings 1874
†Hormotoma gracilens Whitfield 1889
†Hormotoma gracilis Hall 1847
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†Hormotoma gracilis angustatus Hall 1847
†Hormotoma gracilis goodhuensis Ulrich and Scofield 1897
†Hormotoma gracilis multivolvis Ulrich and Scofield 1897
†Hormotoma gracilis sublaxa Ulrich and Scofield 1897
†Hormotoma hebe Billings 1874
†Hormotoma leda Hall 1861
†Hormotoma maia Hall 1861
†Hormotoma moniliformis Lindström 1884
†Hormotoma obtusangula Lindström 1884
†Hormotoma procris Billings 1865
†Hormotoma salteri Ulrich and Scofield 1897
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†Hormotoma salteri canadensis Ulrich and Scofield 1897
†Hormotoma salteri nitida Ulrich and Scofield 1897
†Hormotoma salteri tennesseensis Ulrich and Scofield 1897
†Hormotoma simulatrix Billings 1865
†Hormotoma subangulata Ulrich and Scofield 1897
†Hormotoma subplicata Lindström 1884
†Hormotoma trentonensis Ulrich and Scofield 1897
†Hormotoma vesta Billings 1865
G. †Phanerotrema Fischer 1885
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†Phanerotrema grayvillensis Norwood and Pratten 1855
†Phanerotrema marcouianum Geinitz 1866
†Phanerotrema occidens Hall 1867
G. †Plethospira Ulrich and Scofield 1897
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†Plethospira cassina Whitfield 1886
†Plethospira semele Hall 1861
†Plethospira striata Ulrich and Scofield 1897
G. †Schizolopha Ulrich and Scofield 1897
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†Schizolopha moorei Ulrich and Scofield 1897
†Schizolopha textilis Ulrich and Scofield 1897
G. †Seelya Ulrich and Scofield 1897
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†Seelya cassandra Billings 1865
†Seelya difficilis Whitfield 1890
†Seelya lloydii de Sowerby and Murchison 1839
†Seelya mundula Ulrich and Scofield 1897
†Seelya ventricosa Ulrich and Scofield 1897
G. †Solenospira Ulrich and Scofield 1897
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†Solenospira adelina Billings 1865
†Solenospira attenuata Hall 1856
†Solenospira gracilis Goldfuss 1844
†Solenospira missisquoi Billings 1865
†Solenospira nana de Koninck 1881
†Solenospira pagoda Salter 1859
†Solenospira prisca Billings 1859
†Solenospira quadricarinata M'Coy 1844
†Solenospira tenuis de Koninck 1883
†Solenospira tricincta d’Archiac and de Verneuil 1842
†Solenospira turritella Hall 1856
†Solenospira vermicula Hall 1856
G. †Trepospira Ulrich and Scofield 1897
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Subg. †Trepospira (Trepospira) Ulrich and Scofield 1897
†Trepospira rotalia Hall 1862
†Trepospira sphaerulata Conrad 1842
G. †Turritoma Ulrich and Scofield 1897
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†Turritoma acrea Billings 1865
†Turritoma ada Billings 1865
†Turritoma boylei Nicholson 1875
†Turritoma cava Lindström 1884
†Turritoma constricta Whiteaves 1884
†Turritoma laphami Hall 1860
Fm. †Raphistomidae Koken 1896
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G. †Omospira Ulrich and Scofield 1897
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†Omospira alexandra Billings 1865
†Omospira laticincta Ulrich and Scofield 1897
G. †Raphistoma Hall 1847
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†Raphistoma calyx Billings 1859
†Raphistoma crevieri Billings 1859
†Raphistoma peracutum Ulrich and Scofield 1897
†Raphistoma qualteriata von Schlotheim 1820
†Raphistoma richmondensis Ulrich and Scofield 1897
†Raphistoma schmidti Koken 1889
G. †Raphistomina Ulrich and Scofield 1897
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†Raphistomina astraliformis Lindström 1884
†Raphistomina denticulata Ulrich and Scofield 1897
†Raphistomina gothlandicus Lindström 1884
†Raphistomina incisus Lindström 1884
†Raphistomina lapicida Salter 1859
†Raphistomina laurentina Billings 1859
†Raphistomina lundgreni Lindström 1884
†Raphistomina modesta Ulrich and Scofield 1897
†Raphistomina rugata Ulrich and Scofield 1897
Fm. †Bucaniidae Ulrich and Scofield 1897
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G. †Bucania Hall 1847
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†Bucania crassa Ulrich and Scofield 1897
†Bucania elliptica Ulrich and Scofield 1897
†Bucania emmonsi Ulrich and Scofield 1897
†Bucania exigua Foerste 1887
†Bucania frankfortensis Ulrich and Scofield 1897
†Bucania halli Ulrich and Scofield 1897
†Bucania lindsleyi Safford 1869
†Bucania micronema Ulrich and Scofield 1897
†Bucania minnesotensis Ulrich and Scofield 1897
†Bucania nashvillensis Ulrich and Scofield 1897
†Bucania peracuta Ulrich and Scofield 1897
†Bucania rugatina Ulrich and Scofield 1897
†Bucania simulatrix Ulrich and Scofield 1897
†Bucania singularis Ulrich and Scofield 1897
†Bucania subangulata Ulrich and Scofield 1897
†Bucania sublata Ulrich and Scofield 1897
G. †Conradella Ulrich and Scofield 1897
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†Conradella bellula Ulrich and Scofield 1897
†Conradella compressus Conrad 1838
†Conradella elegans Miller 1874
†Conradella fimbriata Ulrich and Scofield 1897
†Conradella gracillima Koken 1896
†Conradella grandis Ulrich and Scofield 1897
†Conradella imbricata Meek and Worthen 1868
†Conradella obliqua Ulrich and Scofield 1897
†Conradella pannosus Billings 1866
†Conradella similis Ulrich and Scofield 1897
†Conradella triangularis Ulrich and Scofield 1897
G. †Kokenia Ulrich and Scofield 1897
G. †Megalomphala Ulrich and Scofield 1897
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†Megalomphala contorta d'Eichwald 1856
†Megalomphala taenia Lindström 1884
G. †Oxydiscus Koken 1889
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†Oxydiscus acutus de Sowerby and Murchison 1839
†Oxydiscus argo Billings 1860
†Oxydiscus cristatus Safford 1869
†Oxydiscus curvilineatus Conrad 1842
†Oxydiscus disculus Billings 1860
†Oxydiscus discus Lindström 1884
†Oxydiscus imitator Koken 1889
†Oxydiscus macer Billings 1865
†Oxydiscus magnus Miller 1878
†Oxydiscus orbiculus Lindström 1884
†Oxydiscus palinurus Billings 1865
†Oxydiscus planissimus d'Eichwald 1860
†Oxydiscus subacutus Ulrich and Scofield 1897
G. †Salpingostoma Roemer 1876
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†Salpingostoma canadensis Billings 1866
†Salpingostoma expansa Hall 1847
†Salpingostoma imbricata Ulrich and Scofield 1897
†Salpingostoma richmondensis Ulrich and Scofield 1897
†Salpingostoma sculptilis Ulrich and Scofield 1897
Fm. †Protowarthiidae Ulrich and Scofield 1897
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G. †Bucanella Meek 1871
G. †Protowarthia Ulrich and Scofield 1897
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†Protowarthia acutilira Hall 1859
†Protowarthia bilobata de Sowerby and Murchison 1839
†Protowarthia cancellata Hall 1847
†Protowarthia cassinensis Whitfield 1886
†Protowarthia concinna Ulrich and Scofield 1897
†Protowarthia granistriata Ulrich and Scofield 1897
†Protowarthia obesus Ulrich and Scofield 1897
†Protowarthia pervoluta Ulrich and Scofield 1897
†Protowarthia planodorsata Ulrich and Scofield 1897
†Protowarthia rectangularis Ulrich and Scofield 1897
†Protowarthia subcompressa Ulrich and Scofield 1897
G. †Sinuites Koken 1896
G. †Palaeacmaea Hall and Whitfield 1872
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†Palaeacmaea humilis Ulrich and Scofield 1897
†Palaeacmaea orphyne Billings 1865
†Palaeacmaea quebecensis Billings 1865
Subg. †Trochonema (Eunema) Salter 1859
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†Trochonema (Eunema) arctatum Ulrich and Scofield 1897
†Trochonema (Eunema) clivosa Sardeson 1892
†Trochonema (Eunema) nitidum Ulrich and Scofield 1897
†Trochonema (Eunema) obsoletum Ulrich and Scofield 1897
†Trochonema (Eunema) robbinsi Ulrich and Scofield 1897
†Trochonema (Eunema) salteri Ulrich and Scofield 1897
†Trochonema (Eunema) simile Ulrich and Scofield 1897
Subg. †Cyclonema (Gyronema) Ulrich and Scofield 1897
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†Cyclonema (Gyronema) praecipitum Ulrich and Scofield 1897
Subg. †Cyclonema (Holopea) Hall 1847
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†Cyclonema (Holopea) limatum Ulrich and Scofield 1897