Classification of the order Tarphyceratida
Or. †Tarphycerida Flower and Kummel, Jr. 1950
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G. †Bateroboceras
G. †Bodieceras
G. †Craftonoceras
Fm. †Estonioceratidae Hyatt 1900
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G. †Aethoceras Teichert and Glenister 1954
G. †Alaskoceras Miller and Kummel 1945
G. †Aphetoceras Hyatt 1894
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†Aphetoceras americanum Hyatt 1894
†Aphetoceras attenuatum Hyatt 1894
†Aphetoceras boreale Hyatt 1894
†Aphetoceras evolutum Ulrich et al. 1942
†Aphetoceras farnsworthi Billings 1861
†Aphetoceras oderi Ulrich et al. 1942
†Aphetoceras ozarkensis Cullison 1944
†Aphetoceras ruedemanni Ulrich et al. 1942
†Aphetoceras subcostulatum Ulrich et al. 1942
G. †Deltoceras Hyatt 1894
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†Deltoceras capax Ulrich et al. 1942
†Deltoceras planum Hyatt 1894
†Deltoceras vaningeni Ruedemann 1906
G. †Eichwaldoceras Balashov 1955
G. †Pycnoceras Hyatt 1894
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†Pycnoceras adamsense Stait 1983
†Pycnoceras apertum Hyatt 1894
†Pycnoceras calciferiforme Hyatt 1894
†Pycnoceras clausum Ulrich et al. 1942
†Pycnoceras rotundatum Ulrich et al. 1942
G. †Shumardoceras Ulrich and Foerste 1936
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†Shumardoceras complanatum Shumard 1863
†Shumardoceras fragile Ulrich et al. 1942
†Shumardoceras taneyense Ulrich et al. 1942
G. †Tragoceras Remelé 1890
Invalid names: Deltoceratidae Ulrich et al. 1942 [synonym]
G. †Inclytoceras
G. †Kosovoceras
G. †Magdoceras
Fm. †Ophidioceratidae Hyatt 1894
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G. †Pakrioceras
Fm. †Tarphyceratidae Hyatt 1894
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G. †Campbelloceras Ulrich and Foerste 1936
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†Campbelloceras brevicameratum Ulrich et al. 1942
†Campbelloceras hyatti Ulrich et al. 1942
†Campbelloceras mcgerriglei Ulrich et al. 1942
†Campbelloceras rotundum Hyatt 1894
†Campbelloceras simplex Cullison 1944
†Campbelloceras virginianus Hyatt 1894
G. †Centrotarphyceras Ulrich and Foerste 1936
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†Centrotarphyceras apheusi Ulrich et al. 1942
†Centrotarphyceras bidgei Ulrich et al. 1942
†Centrotarphyceras imperator Billings 1861
†Centrotarphyceras macdonaldi Hyatt 1894
†Centrotarphyceras powersi Ulrich et al. 1942
†Centrotarphyceras seelyi Whitfield 1886
†Centrotarphyceras subundosum Ulrich et al. 1942
†Centrotarphyceras yellvillense Ulrich et al. 1942
G. †Cycloplectoceras Ulrich et al. 1942
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†Cycloplectoceras funatum Ulrich et al. 1942
†Cycloplectoceras miseri Ulrich et al. 1942
G. †Eurystomites Schröder 1891
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†Eurystomites accelerans Ruedemann 1906
†Eurystomites amplectens Ruedemann 1906
†Eurystomites avensis Ulrich et al. 1942
†Eurystomites bolarensis Ulrich et al. 1942
†Eurystomites ferox Billings 1861
†Eurystomites gibbosum Hyatt 1894
†Eurystomites kelloggi Whitfield 1886
†Eurystomites undatum Hall 1847
G. †Falcilituites Remele 1886
G. †Moreauoceras Cullison 1944
G. †Pilotoceras Cullison 1944
G. †Pionoceras Ulrich et al. 1942
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†Pionoceras peachi Evans 2011
†Pionoceras pompanium Billings 1862
†Pionoceras pomponium Billing 1862
†Pionoceras smithvillense Ulrich et al. 1942
†Pionoceras swartzi Ulrich et al. 1942
†Pionoceras vokesi Ulrich et al. 1942
G. †Planctoceras Schröder 1891
G. †Sweetoceras Stumbur 1962
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†Discoceras boreale amplicameratum Sweet 1958
†Sweetoceras boreale Sweet 1958
G. †Tarphyceras Hyatt 1894
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†Tarphyceras apollo Billings 1861
†Tarphyceras aucoini Hyatt 1894
†Tarphyceras chadwickense Ulrich et al. 1942
†Tarphyceras champlainense Whitfield 1886
†Tarphyceras clarkei Ruedemann 1906
†Tarphyceras convolvens Angelin and Lindstrom 1880
†Tarphyceras extensum Hyatt 1894
†Tarphyceras multicameratum Ruedemann 1906
†Tarphyceras palinurus Billings 1861
†Tarphyceras perkinsi Whitfield 1897
†Tarphyceras prematurum Hyatt 1894
Fm. †Trocholitidae Chapman 1857
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G. †Curtoceras Ulrich et al. 1942
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†Curtoceras abditus Kröger and Aubrechtova 2017
†Curtoceras billingsi Foerste 1938
†Curtoceras eatoni Whitfield 1886
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Invalid names: Schroederoceras cassinense Whitfield 1886 [synonym]
†Curtoceras internastriatum Whitfield 1886
†Curtoceras minganense Foerste 1938
G. †Discoceras Barrande 1867
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†Discoceras amtjaernense Kröger and Aubrechtová 2019
†Discoceras angulatum Saemann 1852
†Discoceras antiquissima Eichwald 1842
†Discoceras antiquissimus Roemer 1861
†Discoceras arctuatum Lossen 1860
†Discoceras depressum Sweet 1958
†Discoceras fleischeri Sweet 1958
†Discoceras hyatti Strand 1934
†Discoceras idaense Teichert and Glenister 1962
†Discoceras ievesense Balaschov 1953
†Discoceras nilssoni Kröger and Aubrechtová 2019
†Discoceras rarospira Eichwald 1860
†Discoceras roemeri Strand 1934
†Discoceras saemanni Hyatt 1894
†Discoceras siljanense Kröger et al. 2011
†Discoceras tubulatum Hyatt 1894
†Discoceras vasalemmense Balaschov 1953
G. †Graftonoceras Foerste 1925
G. †Hardmanoceras Teichert and Glenister 1952
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†Hardmanoceras chrysanthimum Kobayashi 1959
†Hardmanoceras lobatum Teichert and Glenister 1952
G. †Litoceras Hyatt 1883
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†Litoceras calciferum Billings 1865
†Litoceras versutum Billings 1865
†Litoceras whiteavsi Hyatt 1894
G. †Paradiscoceras Barskov 1972
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†Paradiscoceras dissitum Stait et al. 1985
†Paradiscoceras orientale Barskov 1972
G. †Plectolites
G. †Schroederoceras Hyatt 1894
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†Schroederoceras angulatum Saemann 1852
†Schroederoceras saemanni Hyatt 1894
†Schroederoceras tubulatum Hyatt 1894
G. †Trocholites Conrad 1838
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†Trocholites ammonius Conrad 1838
†Trocholites contractus Schroeder 1891
†Trocholites depressus Eichwald 1860
†Trocholites faberi Foerste 1929
†Trocholites fugax Babin and Gutiérrez-Marco 1992
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Invalid names: Lituites primulus Barrande 1865 [synonym]
†Trocholites gennadii Kröger and Aubrechtova 2017
†Trocholites gracilis Flower 1943
†Trocholites hospes Remele 1880
†Trocholites internestriatus Whitfield 1886
†Trocholites ruedemanni Flower 1943
G. †Trocholitoceras Hyatt 1894
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†Trocholitoceras bevani Ulrich et al. 1942
†Trocholitoceras juvenicostatum Ulrich et al. 1942
†Trocholitoceras latum Ulrich et al. 1942
†Trocholitoceras philipsburgense Ulrich et al. 1942
†Trocholitoceras walcotti Hyatt 1894
G. †Wichitoceras Ulrich et al. 1942
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†Wichitoceras chadwickense Ulrich et al. 1942
†Wichitoceras compressum Ulrich et al. 1942
†Wichitoceras crassum Ulrich et al. 1942
†Wichitoceras decipiens Ulrich et al. 1942
†Wichitoceras naylorense Ulrich et al. 1942
Invalid names: Discoceratidae Dzik 1984 [empty]