| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Orthoceratoidea
Taxonomy
Orthocerataceae was named by M'Coy (1844).
It was reranked as the suborder Orthocerataceae by Evans (1996); it was reranked as the subclass Orthoceratoidea by Evans (2005), Kröger and Evans (2011) and Pohle et al. (2022).
It was assigned to Orthocerida by Sweet (1964), Chen et al. (1981), Evans (1994) and Evans (1996); and to Cephalopoda by Evans (2005), Kröger and Evans (2011) and Pohle et al. (2022).
It was reranked as the suborder Orthocerataceae by Evans (1996); it was reranked as the subclass Orthoceratoidea by Evans (2005), Kröger and Evans (2011) and Pohle et al. (2022).
It was assigned to Orthocerida by Sweet (1964), Chen et al. (1981), Evans (1994) and Evans (1996); and to Cephalopoda by Evans (2005), Kröger and Evans (2011) and Pohle et al. (2022).
Synonymy list
| Year | Name and author |
|---|---|
| 1844 | Orthocerataceae M'Coy |
| 1964 | Orthocerataceae Sweet p. 224 |
| 1981 | Orthocerataceae Chen et al. p. 33 |
| 1994 | Orthocerataceae Evans p. 18 |
| 1996 | Orthocerataceae Evans p. 71 |
| 2005 | Orthoceratoidea Evans p. 24 |
| 2011 | Orthoceratoidea Kröger and Evans |
| 2022 | Orthoceratoidea Pohle et al. p. 21 |
Is something missing? Join the Paleobiology Database and enter the data
|
|
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
Subcl. †Orthoceratoidea M'Coy 1844
show all | hide all
Or. †Actinocerida Teichert 1933
+
Fm. †Actinoceratidae Saeman 1853
+
G. †Actinoceras Bronn 1837
+
†Actinoceras abortivum Flower 1957
†Actinoceras aequale Flower 1957
†Actinoceras altopontense Foerste and Teichert 1930
†Actinoceras anticostiense Billings 1857
†Actinoceras arcuanotum Flower 1943
†Actinoceras carletonense Twenhofel 1928
†Actinoceras curdsvillense Foerste and Teichert 1930
†Actinoceras gradatum Flower 1957
†Actinoceras huronioides Flower 1957
†Actinoceras incantatum Flower 1957
†Actinoceras insulaenigrae Strand 1934
†Actinoceras kentuckiense Foerste and Teichert 1930
†Actinoceras lambei Foerste 1924
†Actinoceras lesperancei Holland and Copper 2008
†Actinoceras margaretae Flower 1957
†Actinoceras mutabile Flower 1957
†Actinoceras sinclairi Flower 1957
†Actinoceras winstoni Flower 1957
Invalid names: Metactinoceras [synonym]
G. †Ellinoceras Balashov 1960
G. †Floweroceras Miller and Youngquist 1947
G. †Kochoceras Troedsson 1926
+
G. †Saffordoceras Foerste and Teichert 1930
G. †Troostoceras Foerste and Teichert 1930
Fm. †Armenoceratidae Troedsson 1926
+
G. †Armenoceras Foerste 1924
+
†Armenoceras australe Flower 1957
†Armenoceras barnesi Flower 1957
†Armenoceras callaghani Flower 1957
†Armenoceras chediforme Kobayashi 1958
†Armenoceras chicottense Foerste 1928
+
Invalid names: Armenoceras excentrale Foerste 1928 [synonym]
†Armenoceras cygneum Holland 1998
†Armenoceras hearsti Parks 1913
†Armenoceras holtedahli Strand 1934
†Armenoceras lenticontractum Flower 1957
†Armenoceras michaudae Bolton and Nowlan 1979
†Armenoceras nummularium de Sowerby and Murchison 1839
†Armenoceras raptor Billings 1866
†Armenoceras robsoni Whiteaves 1898
†Armenoceras subconicum d'Orbigny 1850
†Armenoceras vesperale Flower 1957
Invalid names: Helenites Zhuravleva 1962 [synonym], Tunguskoceras [synonym]
G. †Kailiceras Chen and Liu 1974
G. †Megadiscosorus Foerste 1925
+
†Megadiscosorus crassisegmentatus Foerste 1925
†Megadiscosorus crassisegmentatus brevior Foerste 1925
†Megadiscosorus inopinatus Foerste 1925
G. †Monocyrtoceras Foerste 1924
G. †Nybyoceras Troedsson 1926
+
†Nybyoceras balticum Troedsson 1926
†Nybyoceras bekkeri Troedsson 1926
†Nybyoceras cryptum Flower 1955
†Nybyoceras holmi Sweet 1958
†Nybyoceras intermedium Teichert 1930
†Nybyoceras montoyense Flower 1957
†Nybyoceras troedssoni Strand 1934
†Nybyoceras ulrichi Foerste and Teichert 1930
G. †Selkirkoceras Foerste 1929
+
†Selkirkoceras burnamense Flower 1957
†Selkirkoceras taepaekense Kobayashi 1977
G. †Stolbovoceras Balashov 1962
G. †Astoceras
G. †Calhounoceras Troedsson 1926
Fm. †Carbactinoceratidae Schindewolf 1943
+
G. †Aploceras d'Orbigny 1849
G. †Carbactinoceras Schindewolf 1935
G. †Rayonnoceras Croneis 1926
+
†Rayonnoceras cadyi Croneis 1926
†Rayonnoceras eccentricum Gordon 1964
†Rayonnoceras fayettevillense Croneis 1926
†Rayonnoceras irregulare Schwarzbach 1937
†Rayonnoceras nobile Meek and Worthen 1865
†Rayonnoceras protentum Gordon 1964
†Rayonnoceras solidiforme Croneis 1926
+
Invalid names: Rayonnoceras buffaloense Foerste and Teichert 1930 [synonym]
†Rayonnoceras vaughanianum Girty 1909
+
Invalid names: Rayonnoceras girtyi Foerste and Teichert 1930 [synonym]
G. †Eldroceras Foerste 1924
Fm. †Gonioceratidae Hyatt 1884
+
G. †Gonioceras Hall 1847
+
†Gonioceras anceps Hall 1847
†Gonioceras brainerdi Flower 1957
†Gonioceras chaziense Ruedemann 1906
†Gonioceras minor Flower 1952
†Gonioceras multiseptatum Flower 1957
†Gonioceras obtusum Flower 1957
†Gonioceras pameliense Flower 1957
†Gonioceras paquettense Flower 1957
†Gonioceras quadratum Flower 1957
G. †Hoeloceras Sweet 1958
+
†Hoeloceras askeri Sweet 1958
†Hoeloceras helgoeyense Sweet 1958
†Hoeloceras muroni Kröger and Aubrechtova 2017
G. †Lambeoceras Foerste 1917
+
†Lambeoceras armstrongi Flower 1957
†Lambeoceras baffinense Miller et al. 1954
†Lambeoceras montrealense Flower 1952
†Lambeoceras nudum Troedsson 1928
†Lambeoceras rotundum Flower 1957
Fm. †Greenlandoceratidae Shimizu and Obata 1935
+
G. †Greenlandoceras Shimizu and Obata 1935
+
Invalid names: Greenlandoceras Shimizu and Obata 1935 [objective synonym]
G. †Pseudokionoceras
G. †Standardoceras
G. †Hopeioceras Shimuzu and Obata 1936
Fm. †Huroniidae Foerste and Teichert 1930
+
G. †Discoactinoceras Kobayashi 1927
G. †Huronia Stokes 1824
G. †Huroniella Foerste 1924
G. †Jeholoceras Kobayashi and Matumoto 1942
Fm. †Meitanoceratidae Kobayashi 1977
+
G. †Pomphoceras Zou and Chen 1984
+
†Pomphoceras nyalamense Chen 1975
†Pomphoceras wuhaiense Zou and Chen 1984
Fm. †Ormoceratidae Saeman 1853
+
G. †Deiroceras Hyatt 1884
+
†Deiroceras curdsvillense Foerste and Teichert 1930
†Deiroceras hollardi Kröger 2008
†Deiroceras python Billings 1857
G. †Metarmenoceras Flower 1940
+
†Metarmenoceras bilaterale Flower 1940
†Metarmenoceras fatimae Kröger 2008
G. †Mstikhinoceras Shimanskiy 1961
G. †Ormoceras Stokes 1840
+
†Ormoceras bayfieldi Stokes 1840
†Ormoceras centrale Flower 1940
†Ormoceras champlainense Flower 1952
†Ormoceras dartoni Flower 1957
†Ormoceras ferecentricum Foerste. and Teichert 1930
†Ormoceras heckeri Teichert 1930
†Ormoceras kiaeri Sweet 1958
†Ormoceras neumani Flower 1957
†Ormoceras schohariae Flower 1940
Invalid names: Aluveroceras [synonym]
G. †Orthonybyoceras Shimizu and Obata 1935
+
†Orthonybyoceras covingtonense Foerste and Teichert 1930
†Orthonybyoceras dyeri Miller 1875
†Orthonybyoceras isakari Kröger and Aubrechtova 2017
†Orthonybyoceras moisense Kröger and Aubrechtova 2017
Invalid names: Siberioceras [synonym]
G. †Parormoceras Shimizu and Obata 1935
G. †Troedssonoceras Foerste 1928
G. †Parahelenites Chen and Liu 1974
+
†Parahelenites asymmetricus Stait 1988
†Parahelenites guizhouensis Chen and Liu 1974
Fm. †Parahelenitidae Chen et al. 1981
+
G. †Euryarthroceras Chen et al. 1981
G. †Eushantungoceras Shimizu and Obata 1935
Fm. †Pseudactinoceratidae Schindewolf 1943
+
G. †Linteroceras Mironenko 2023
+
†Linteroceras deflexum Trautschold 1867
†Linteroceras incommoda Shimansky 1968
Invalid names: Linter Shimansky 1968 [replaced]
G. †Subtofangoceras Shimuzu and Obata 1936
Fm. †Wutinoceratidae Shimizu and Obata 1935
+
G. †Cyrtonybyoceras Teichert 1933
G. †Mesowutinoceras Chen 1976
G. †Zerashanoceras
Invalid names: Gouldoceratidae Stait 1984 [empty]
Or. †Dissidocerida Zhuravleva 1964
+
Superfm. †Dissidocerataceae Zhuravleva 1964
+
Fm. †Cyptendoceratidae Zhuravleva 1994
+
Fm. †Dissidoceratidae Zhuravleva 1964
+
G. †Balashovoceras Kiselev 1990
G. †Dissidoceras Zhuravleva 1964
Fm. †Orthodochmioceratidae Chen et al. 1981
+
G. †Actinodochmioceras Chen 1981
G. †Orthodochmioceras Chen et al. 1981
Fm. †Geisonoceratidae Zhuravleva 1959
+
G. †Angeisonoceras Kröger 2008
+
†Angeisonoceras consocium Barrande 1870
†Angeisonoceras davidsoni Barrande 1870
†Angeisonoceras festians Barrande 1870
†Angeisonoceras imminutum Barrande 1870
†Angeisonoceras inchoatum Barrande 1868
†Angeisonoceras libens Barrande 1870
†Angeisonoceras limatum Barrande 1870
†Angeisonoceras reteornatum Kröger 2008
†Angeisonoceras squamatulum Barrande 1868
G. †Columenoceras Barskov 1960
G. †Geisonoceras Hyatt 1884
+
†Geisonoceras heintzi Strand 1934
†Geisonoceras kureikense Zhuraleva 1964
†Geisonoceras maclareni Murchison 1859
†Geisonoceras shumardi Billings 1859
†Geisonoceras wegelini Teichert 1930
G. †Geisonocerina
G. †Harrisoceras Flower 1939
G. †Joachimoceras Barskov 1960
G. †Jonesoceras Barskov 1960
G. †Ordogeisonoceras Frey 1995
+
†Ordogeisonoceras amplicameratum Hall 1847
+
Invalid names: Michelinoceras ludlowense Miller and Faber 1894 [synonym]
†Ordogeisonoceras foerstei Strand 1934
†Ordogeisonoceras tartuensis Kröger and Aubrechtova 2017
†Ordogeisonoceras uppsalaensis Kröger and Aubrechtová 2019
G. †Protokionoceras Grabau and Shimer 1910
+
†Protokionoceras fessicancellatum Kobayashi et al. 1984
†Protokionoceras strandi Troedsson 1932
G. †Striacoceras Flower 1936
G. †Temperoceras Barskov 1960
+
†Temperoceras aequinudum Kröger 2008
†Temperoceras ludense Sowerby 1839
+
Invalid names: Orthoceras dahlii Barrande 1870 [synonym], Orthoceras omnium Barrande 1868 [synonym], Orthoceras temperans Barrande 1867 [synonym]
†Temperoceras migrans Barrande 1868
†Temperoceras nudum Barrande 1870
Fm. †Rangeroceratidae Evans 2005
+
G. †Anrangeroceras Kröger and Landing 2009
+
†Anrangeroceras repens Billings 1856
†Anrangeroceras whitehallense Kröger and Landing 2009
Superfm. †Troedssonellaceae Kobayashi 1935
+
Fm. †Narthecoceratidae Flower 1958
+
G. †Donacoceras Foerste 1925
+
†Donacoceras arundineum Foerste 1925
†Donacoceras bellense Foerste 1925
†Donacoceras percense Foerste 1936
†Donacoceras timiskamingense Foerste 1925
G. †Farroceras Flower 1968
Invalid names: Donacoceratinae Flower 1968 [empty]
Fm. †Troedssonellidae Kobayashi 1935
+
G. †Buttsoceras Ulrich and Foerste 1933
+
†Buttsoceras adamsi Butts 1926
†Buttsoceras atticus Billings 1865
†Buttsoceras novemexicanum Flower 1962
†Buttsoceras odenvillense Ulrich et al. 1944
†Buttsoceras vandiverense Ulrich et al. 1944
†Buttsoceras williamsi Flower 1962
G. †Cyclobuttsoceras Chen 1976
G. †Oxfordoceras Ulrich et al. 1944
+
†Oxfordoceras atticus Billings 1865
†Oxfordoceras billingsi Ulrich et al. 1944
G. †Sheshanoceras Chen 1984
G. †Troedssonella Kobayashi 1935
Or. †Lituitida Starobogatov 1983
+
Fm. †Lamellorthoceratidae Teichert 1961
+
G. †Arthrophyllum Beyrich 1850
+
†Arthrophyllum crassus Roemer 1844
†Arthrophyllum vermiculare Termier and Termier 1950
Invalid names: Eoteuthis Stürmer 1985 [nomen vanum], Eoteuthis elfriedae Stürmer 1985 [nomen vanum], Lamellorthoceras Termier and Termier 1950 [synonym]
G. †Gorgonoceras Zhuravleva 1961
Fm. †Lituitidae Philips 1848
+
G. †Cyclolituites Remelé 1886
+
†Cyclolituites americanus Hyatt 1894
†Cyclolituites applanatus Remele 1880
†Cyclolituites kjerulfi Sweet 1958
†Cyclolituites lynnensis Kjerulf 1865
G. †Holmiceras Hyatt 1894
+
†Holmiceras coreanicum Kobayashi 1927
†Holmiceras kjaerulfi Brogger 1882
†Holmiceras kjerulfi Brogger 1882
†Holmiceras praecurrens Holm 1891
Invalid names: Sigmorthoceras Kobayashi 1934 [synonym]
G. †Lituites Bertrand 1763
+
†Lituites angulatus Saemann 1852
†Lituites imperfectum Wahlenberg 1821
†Lituites kjerulfi Brogger 1882
†Lituites lituus Montfort 1808
†Lituites perfectus Wahlenberg 1818
G. †Trilacinoceras Sweet 1958
+
†Trilacinoceras discors Holm 1891
†Trilacinoceras norvegicum Sweet 1958
Fm. †Sinoceratidae Shimizu and Obata 1935
+
G. †Rhynchorthoceras Remelé 1882
+
†Rhynchorthoceras angelini Boll 1857
†Rhynchorthoceras beyrichi Remele 1882
†Rhynchorthoceras densum Qi 1980
†Rhynchorthoceras helgoeyense Sweet 1958
†Rhynchorthoceras minor Kröger et al. 2007
†Rhynchorthoceras subcurvatum Qi 1980
Invalid names: Rhynchoceras Remele 1881 [replaced]
G. †Tyrioceras Strand 1933
+
†Tyrioceras kjaerulfi Strand 1934
†Tyrioceras kjerulfi Strand 1934
†Tyrioceras warburgae Frye 1982
Or. †Orthocerida Kuhn 1940
+
G. †Aptychopsis Barrande 1872
+
†Aptychopsis angulatum Jones and Woodward 1892
†Aptychopsis ovata Jones and Woodward 1888
†Aptychopsis prima Barrande 1872
†Aptychopsis salteri Woodward 1882
Fm. †Arionoceratidae Dzik 1984
+
G. †Adiagoceras Kröger 2008
+
†Adiagoceras subnotatum Barrande 1868
†Adiagoceras taouzense Kröger 2008
G. †Arionoceras Barskov 1966
+
†Arionoceras canonicum Meneghini 1843
+
Invalid names: Arionoceras affine Meneghini 1857 [synonym], Orthoceras arion Barrande 1866 [synonym]
†Arionoceras capillosum Barrande 1868
†Arionoceras densiseptum Kobayashi et al. 1984
G. †Parakionoceras Foerste 1928
+
†Parakionoceras originale Barrande 1868
†Parakionoceras yanjinense Chen et al. 1981
†Parakionoceras yinjiangense Chen et al. 1981
G. †Arterioceras
G. †Badouceras
Fm. †Baltoceratidae Kobayashi 1935
+
G. †Annbactroceras Kröger and Evans 2011
+
†Annbactroceras felinense Kröger and Evans 2011
†Annbactroceras martyi Thoral 1935
G. †Bactroceras Holm 1898
+
†Bactroceras angustisiphonatum Rüdiger 1891
+
Invalid names: Bactroceras guichiense Ying 1989 [synonym], Bactroceras jingshanlingense Zou 1987 [synonym], Bactroceras latisiphonatum Glenister 1952 [synonym], Bactroceras wilsoni Flower 1968 [synonym], Irianoceras antiquum Kobayashi and Burton 1971 [synonym]
†Bactroceras avus Holm 1898
†Bactroceras gossei Etheridge 1893
†Bactroceras mourguesi Thoral 1935
Invalid names: Eobactrites Schindewolf 1932 [synonym]
G. †Belloceras
G. †Eosomichelinoceras Chen 1974
+
†Eosomichelinoceras baldisii Kröger et al. 2007
†Eosomichelinoceras huananense Chen 1974
G. †Metabaltoceras Flower 1964
+
†Metabaltoceras fusiforme Flower 1964
†Metabaltoceras minutum Flower 1964
G. †Rhabdiferoceras Flower 1964
+
†Rhabdiferoceras annuliferum Flower 1964
†Rhabdiferoceras pertinens Blake 1882
†Rhabdiferoceras planiseptatum Hook and Flower 1977
Invalid names: Rhabdiferoceras floweri Zhuravleva 1994 [invalid subgroup]
G. †Rhabdiferous
G. †Sinocochleoceras Qi 1980
G. †Bogoslovskya
Fm. †Brachycycloceratidae Furnish et al. 1964
+
G. †Brachycycloceras Miller et al. 1933
+
†Brachycycloceras curtum Meek and Worthen 1860
†Brachycycloceras cyclophorum Waagen 1879
†Brachycycloceras normale Miller et al. 1955
†Brachycycloceras rustaqense Niko et al. 1996
†Brachycycloceras washingtonense Gordon 1964
G. †Chicagooceras Foerste and Savage 1927
G. †Cornuella Shimansky 1968
G. †Cryptocycloceras
G. †Cycloceras M'Coy 1844
+
†Cycloceras hsiangtanense Zhao 1954
†Cycloceras laevigatum M'Coy 1844
†Cycloceras olorus Hall 1879
†Cycloceras waageni Kittl 1903
Invalid names: Perigrammoceras Foerste 1924 [synonym]
G. Dictyoceras Eichwald 1860
G. †Esopoceras
G. †Folioceras
G. †Garryoceras Foerste 1928
G. †Heloceras Eichwald 1860
G. †Jangziceras Lai 1964
Fm. †Kionoceratidae Hyatt 1900
+
G. †Kionoceras Hyatt 1884
+
†Kionoceras coralliforme M'Coy 1846
†Kionoceras decorahense Flower 1952
†Kionoceras densum Chen et al. 1981
†Kionoceras diebuense Chen et al. 1981
†Kionoceras doricum Barrande 1868
†Kionoceras erraticum Flower 1952
†Kionoceras heshuiense Chen et al. 1981
†Kionoceras infrequens Flower 1952
†Kionoceras laqueatum Hall 1847
†Kionoceras liaojiaoshanense Chen et al. 1981
†Kionoceras magnisulcatum Billings 1857
†Kionoceras modicum Chen et al. 1981
†Kionoceras muyagirum Miagkova 1967
†Kionoceras polyplicatum Flower 1952
†Kionoceras serenum Shimanskiy 1954
†Kionoceras styliforme Chen et al. 1981
†Kionoceras valcourense Flower 1952
†Kionoceras virgatum de Sowerby and Murchison 1839
+
Invalid names: Kionoceras bellatulum Billings 1866 [synonym], Kionoceras canaliculatum de Sowerby and Murchison 1839 [synonym]
G. †Polygrammoceras Foerste 1927
+
†Polygrammoceras chicottense Foerste 1928
†Polygrammoceras ellisense Foerste 1928
G. †Thoracoceras Fischer de Waldheim 1844
G. †Mericoceras
G. †Molossus deMontfort 1808
G. †Murchisoniceras
G. †Naivs
G. †Nebroceras
G. †Neorthoceras Shimizu and Obata 1936
Fm. †Orthoceratidae M'Coy 1844
+
G. †Aethiosolen Flower 1968
Subfm. †Anaspyroceratinae Chen et al. 1981
+
G. †Calorthoceras Chen et al. 1981
+
†Calorthoceras butovitzense Chen et al. 1981
†Calorthoceras multicostatum Chen et al. 1981
+
Invalid names: Orthoceras pseudocalamiteum Barrande 1851 [synonym]
G. †Ctenoceras Noetling 1884
+
†Ctenoceras schmidti Noetling 1884
†Ctenoceras sweeti Kröger and Isakar 2006
†Ctenoceras verticillatum Krause 1844
G. †Infundibuloceras Klug et al. 2008
+
†Infundibuloceras brevimira Klug et al. 2008
†Infundibuloceras komiense Zhuravleva 1978
†Infundibuloceras longicameratum Kröger 2008
†Infundibuloceras mira Zhuravleva 1978
†Infundibuloceras mohamadi Kröger 2008
G. †Kopaninoceras Kiselev 1969
+
†Kopaninoceras dorsatoides Kröger 2008
†Kopaninoceras jucundum Barrande 1870
†Kopaninoceras thyrsus Barrande 1870
†Michelinoceras (Kopaninoceras) ninglangense Chen et al. 1981
Subfm. †Leurocycloceratinae Sweet 1964
+
G. †Bohemites
G. †Euthyocycloceras Chen et al. 1981
+
†Euthyocycloceras battlatum Chen et al. 1981
†Euthyocycloceras curvatum Chen et al. 1981
†Euthyocycloceras liaojiaoshanense Chen et al. 1981
†Euthyocycloceras qujingense Chen et al. 1981
G. †Leurocycloceras Foerste 1928
+
†Leurocycloceras etheridgii Blake 1882
†Leurocycloceras raymondi Foerste 1928
†Leurocycloceras yiwagouense Chen et al. 1981
G. †Xiaoxiangoceras Chen et al. 1981
+
†Xiaoxiangoceras pseudoseptatum Chen et al. 1981
†Xiaoxiangoceras xiaoxiangense Chen et al. 1981
G. †Michelinoceras Foerste 1932
+
†Michelinoceras alticameratum Kobayashi et al. 1984
†Michelinoceras currens Barrande 1866
†Michelinoceras floridaense Hook and Flower 1977
†Michelinoceras guadalupense Girty 1909
†Michelinoceras melleni Hook and Flower 1977
†Michelinoceras michelini Barrande 1866
†Michelinoceras mizobuchii Kobayashi et al. 1984
†Michelinoceras palatum Shimanskiy 1996
†Michelinoceras primum Flower 1962
†Michelinoceras richardsi Flower 1962
†Michelinoceras vandiverense Ulrich et al. 1944
†Michelinoceras wapanuckense Girty 1909
Subfm. †Michelinoceratinae Flower 1945
+
G. †Acanthomichelinoceras Kröger et al. 2005
G. †Arkonoceras Flower 1945
+
†Arkonoceras arkonense Flower 1945
†Arkonoceras circularis Sowerby 1814
G. †Hesperoceras Miller and Youngquist 1947
G. †Pedanochonoceras Chen et al. 1981
+
†Pedanochonoceras altothulamum Chen et al. 1981
†Pedanochonoceras centrum Chen et al. 1981
†Pedanochonoceras contractum Chen et al. 1981
†Pedanochonoceras densum Chen et al. 1981
†Pedanochonoceras nanum Chen et al. 1981
†Pedanochonoceras submarginatum Chen et al. 1981
G. †Sinoceras Shimizu and Obata 1935
G. †Orthoceras Breynius 1832
+
†Orthoceras annulata Sowerby 1818
†Orthoceras bisignatum Barrande 1877
†Orthoceras burgense Gemmellaro 1889
†Orthoceras decrescens de Koninck 1863
†Orthoceras dominans de Gregorio 1930
†Orthoceras elegantulum Gemmellaro 1889
†Orthoceras eurekensis Walcott 1884
†Orthoceras expansum Blake 1882
†Orthoceras geinitzi d'Orbigny 1850
†Orthoceras gradatum Gemmellaro 1889
†Orthoceras hulli Gemmellaro 1889
†Orthoceras kingii Meek 1877
†Orthoceras lentum Ruedemann 1906
†Orthoceras lepton Gemmellaro 1889
†Orthoceras luhai Stumbur 1956
†Orthoceras margaritatum Abich 1878
†Orthoceras modestum Ruedemann 1906
†Orthoceras oehlerti Gemmellaro 1889
†Orthoceras orientale Fliegel 1901
†Orthoceras progressum Ruedemann 1906
†Orthoceras punjabiense Waagen 1879
†Orthoceras rachidium de Koninck 1863
†Orthoceras randolphensis Worthen 1882
†Orthoceras siculum Gemmellaro 1889
†Orthoceras spissiseptum Dwight 1884
†Orthoceras submoniliforme Meneghini 1857
†Orthoceras subtriangulare Gemmellaro 1889
†Orthoceras transversum Abich 1878
†Orthoceras turritellum Abich 1878
†Orthoceras vagum Ruedemann 1906
†Orthoceras vesiculosum de Koninck 1863
†Orthoceras waageni Gemmellaro 1889
Invalid names: Orthoceratites Lamarck 1799 [nomen nudum], Orthoceros Brünnich 1771 [objective synonym]
G. †Orthocycloceras Barskov 1972
+
†Orthocycloceras gomiense Kobayashi et al. 1984
†Orthocycloceras tafilaltense Kröger 2008
G. †Palorthoceras Kröger et al. 2007
+
†Palorthoceras buttsi Flower 1962
†Palorthoceras kayseri Kröger et al. 2007
G. †Pleurorthoceras Flower 1962
+
†Pleurorthoceras clarksvillense Foerste 1924
†Pleurorthoceras organi Kröger and Aubrechtova 2017
†Pleurorthoceras osmundsbergense Kröger 2013
†Pleurorthoceras selkirkense Whiteaves 1892
G. †Striatocycloceras Kröger and Isakar 2006
+
†Striatocycloceras foerstei Teichert 1930
†Striatocycloceras isbergi Kröger 2013
†Striatocycloceras obliquum d'Eichwald 1860
†Striatocycloceras romingeri Foerste 1932
†Striatocycloceras undulostriatum Hall 1847
G. †Tibichoanoceras Kröger 2008
+
†Tibichoanoceras abditum Balashov and Kiselev 1968
†Tibichoanoceras riphaeum Zhuravleva 1978
†Tibichoanoceras tibichoanum Kröger 2008
Invalid names: Orthocerotidae Miller and Teichert 1936 [synonym], Prohypogeophis Marcus 1945 [nomen dubium], Prohypogeophis tunariensis Marcus 1945 [nomen dubium]
Subor. †Orthoceratina Dzik 1984
+
Fm. †Dawsonoceratidae Flower 1962
+
G. †Calocyrtocerina Chen 1981
G. †Dawsonoceras Hyatt 1884
+
†Dawsonoceras annulatum Sowerby 1818
†Dawsonoceras barrandei Horný 1956
†Dawsonoceras fenestratum Eichwald 1860
+
Invalid names: Dawsonoceras funiforme Angelin 1880 [synonym], Dawsonoceras porkunense Balashov and Zhuravleva 1962 [synonym]
†Dawsonoceras fimbriatum de Sowerby and Murchison 1839
†Dawsonoceras gregarium Kröger et al. 2011
†Dawsonoceras hyatti Foerste 1928
†Dawsonoceras stumburi Kröger 2013
Invalid names: Cedarvilleoceras [synonym]
G. †Dawsonocerina Horny 1956
G. †Metaspyroceras Foerste 1932
G. †Palaeodawsonocerina Kröger and Isakar 2006
+
†Palaeodawsonocerina nicolletoides Kröger 2013
†Palaeodawsonocerina saxbyense Stumbur 1956
†Palaeodawsonocerina senckenbergi Teichert 1930
Fm. †Eriditidae Chen in Chen et al 1981
+
G. †Allanoceras Barskov 1959
G. †Eridites Zhuravleva 1961
G. †Euvirgoceras Chen 1974
G. †Haloites Chen et al. 1981
G. †Nathorstoceras Kröger 2013
+
†Nathorstoceras adnatum Kröger 2013
†Nathorstoceras bacotense Balashov 1975
†Nathorstoceras kallholnense Kröger 2013
G. †Paradnatoceras
G. †Paramooreoceras
G. †Plicatoceras
G. †Podoliceras
Fm. †Proteoceratidae Flower 1962
+
G. †Archigeisonoceras Chen 1984
G. †Baykonuroceras Barskov 1972
G. †Cyrtactinoceras Hyatt in Zittel 1900
+
†Cyrtactinoceras boycii Whitfield 1886
†Cyrtactinoceras champlainense Ruedemann 1906
G. †Ephippiorthoceras Foerste 1924
+
†Ephippiorthoceras dowlingi Foerste and Savage 1927
+
Invalid names: Ephippiorthoceras modestum Troedsson 1928 [synonym]
†Ephippiorthoceras frognoeyense Strand 1934
†Ephippiorthoceras frognoyense Strand 1934
†Ephippiorthoceras plicatuloides Strand 1934
G. †Euorthoceras Foerste 1893
G. †Gangshanoceras Zou 1988
+
†Gangshanoceras densum Zou 1988
†Gangshanoceras guichinense Ying 1989
†Gangshanoceras jurongense Zou 1988
†Gangshanoceras villicumense Kröger et al. 2007
†Gangshanoceras wennanense Ying 1989
G. †Gorbyoceras Shimizu and Obata 1935
+
†Gorbyoceras alternestriatum Strand 1934
†Gorbyoceras clathroannulatum Roemer 1861
†Gorbyoceras gorbyi Miller 1894
†Gorbyoceras gracile Portlock 1843
†Gorbyoceras hammelli Foerste 1910
†Gorbyoceras tetreauense Wilson 1961
†Gorbyoceras textumaraneum Roemer 1861
Invalid names: Hammelloceras Shimizu and Obata 1935 [synonym]
G. †Isorthoceras Flower 1962
+
†Isorthoceras albersi Miller and Faber 1894
†Isorthoceras angelini Kröger 2013
†Isorthoceras cavi Kröger and Aubrechtova 2017
†Isorthoceras curvilineatum Kröger 2013
†Isorthoceras dalecarlense Kröger et al. 2011
†Isorthoceras elongatocinctum Portlock 1843
†Isorthoceras heintzi Strand 1934
†Isorthoceras heroyense Strand 1934
†Isorthoceras hudsonicum Ruedemann 1912
†Isorthoceras junceum Hall 1877
†Isorthoceras maris Kröger and Aubrechtova 2017
†Isorthoceras nikwis Kröger and Aubrechtová 2019
†Isorthoceras padisense Kröger and Aubrechtova 2017
†Isorthoceras rogersensis Foerste 1914
+
Invalid names: Treptoceras praenuntium Flower 1942 [synonym]
†Isorthoceras sociale Hall in Miller 1877
†Isorthoceras strigatum Hall 1847
†Isorthoceras suave Angelin and Lindström 1880
†Isorthoceras subcostatum Portlock 1843
†Isorthoceras sylphide Kröger and Aubrechtová 2019
†Isorthoceras urdr Kröger and Aubrechtová 2019
†Isorthoceras vexilli Kröger and Aubrechtova 2017
†Isorthoceras wahlenbergi Niko 2007
G. †Liulinoceras Zou and Chen 1984
G. †Metephippiorthoceras Zhuravleva 1957
G. †Monomuchites Wilson 1961
+
†Monomuchites annularis Frey 1995
†Monomuchites costalis Wilson 1961
†Monomuchites obliquum Frey 1995
G. †Paraproteoceras Chen 1981
G. †Proteoceras Flower 1955
+
†Proteoceras moniliforme Hall 1847
†Proteoceras perkinsi Ruedemann 1906
†Proteoceras pulchrum Flower 1955
G. †Pseudeskimoceras Shimizu and Obata 1936
G. †Pseudoliolinoceras Zou and Chen 1984
G. †Stereospyroceras Flower 1955
+
†Stereospyroceras champlainense Flower 1955
†Stereospyroceras clintoni Miller 1877
G. †Tofangoceras Kobayashi 1927
+
Invalid names: Kogenoceras Shimizu and Obata 1936 [synonym], Tofangocerina Sweet 1964 [synonym]
G. †Treptoceras Flower 1942
+
†Treptoceras cincinnatiensis Miller 1875
†Treptoceras duseri Hall and Whitfield 1875
†Treptoceras fosteri Miller 1875
†Treptoceras yokoyamai Kobayashi 1927
G. †Ulmioceras Zhuravleva 1990
Invalid names: Hammelloceratidae Shimizu and Obata 1936 [synonym]
Superfm. †Pseudorthocerataceae Sweet 1964
+
Fm. †Cyrtactinoceratidae Chen et al. 1981
+
G. †Armenocerina Chen et al. 1981
G. †Heyuncunoceras Chen et al. 1981
G. †Platysmoceras Chen et al. 1981
Fm. †Stereoplasmoceratidae Kobayashi 1934
+
G. †Stereoplasmocerina Kobayashi 1936
+
†Stereoplasmocerina approximata Sweet 1958
†Stereoplasmocerina lineata Sweet 1958
Superfm. †Pseudorthoceratoidea Flower and Caster 1935
+
Fm. †Sactoceratidae Troedsson 1926
+
G. †Sactoceras Hyatt 1884
+
†Sactoceras hadelandicum Strand 1934
†Sactoceras manitoulinense Foerste 1924
†Sactoceras piso Billings 1865
†Sactoceras tyriense Strand 1934
†Sactoceras westonense Foerste 1924
G. †Pythonoceras
G. †Rhabdites
G. †Rhipsites
Fm. †Sactorthoceratidae Flower 1946
+
G. †Cartersoceras Flower 1964
+
†Cartersoceras noveboracense Flower 1952
†Cartersoceras popei Frey 1995
†Cartersoceras shideleri Flower 1964
G. †Leptoplatophrenoceras Chen and Zou 1984
G. †Murrayoceras Foerste 1926
+
†Murrayoceras murrayi Billings 1857
†Murrayoceras primum Flower 1955
G. †Sactorthoceras Kobayashi 1934
+
†Sactorthoceras banestanensis Dastanpour et al. 2006
†Sactorthoceras gonioseptum Kobayashi 1934
†Sactorthoceras makkolense Kobayashi 1927
+
Invalid names: Cycloceras taihakuense Kobayashi 1934 [synonym], Kawasakiceras densistriatum Kobayashi 1934 [synonym], Sactorthoceras shimamurai Kobayashi 1934 [synonym], Sigmorthoceras sigmoidale Kobayashi 1934 [synonym]
Invalid names: Kawasakiceras Kobayashi 1934 [synonym]
G. †Scipioceras Zhuravleva 1964
G. †Sigmocycloceras Kobayashi 1934
G. †Wennanoceras Chen 1976
G. †Wolungoceras Kobayashi 1931
G. †Sannionites deWaldheim 1829
G. †Sichuanaceras
Fm. †Sichuanoceratidae Zhuravleva 1978
+
G. †Neosichuanoceras Chen et al. 1981
G. †Sichuanoceras Chang 1962
+
†Sichuanoceras quizhouense Chang 1962
†Sichuanoceras zizense Kröger 2008
Fm. †Sphaerorthoceratidae Ristedt 1968
+
G. †Hemicosmorthoceras Ristedt 1968
+
†Hemicosmorthoceras aichae Kröger 2008
†Hemicosmorthoceras dimidiatum Sowerby in Murchinson 1839
†Hemicosmorthoceras laterculum Ristedt 1968
†Hemicosmorthoceras semimbricatum Gnoli 1982
G. †Plagiostomoceras Teichert and Glenister 1952
+
†Plagiostomoceras angustum Holzapfel 1885
†Plagiostomoceras bifrons Barrande 1866
†Plagiostomoceras culter Barrande 1866
†Plagiostomoceras gruenwaldti Barrande 1866
†Plagiostomoceras lategruenwaldti Kröger 2008
†Plagiostomoceras placidum Barrande 1868
†Plagiostomoceras pleurotomum Barrande 1874
†Plagiostomoceras reticulatum Kröger 2008
†Plagiostomoceras thomasi Teichert and Glenister 1952
G. †Subspyroceras Shimizu and Obata 1935
G. †Tartaroceras
G. †Tretoceras Salter 1958
Fm. †Tripteroceratidae Flower 1941
+
G. †Allumettoceras Foerste 1926
+
†Allumettoceras courtownense Evans 1994
†Allumettoceras giganteum Flower 1947
†Allumettoceras mjoesense Sweet 1958
†Allumettoceras oneratum Evans 1994
†Allumettoceras pauquettense Foerste 1924
†Allumettoceras tenerum Billings 1860
G. †Tripteroceras Hyatt 1884
+
Subg. †Tripteroceras (Lambeoceras) Foerste 1917
+
†Tripteroceras (Lambeoceras) richmondensis Foerste 1917
†Tripteroceras cariniferum Flower 1952
†Tripteroceras problematicum Sweet 1958
G. †Tripterocerina Foerste 1935
G. †Trispectes
G. †Uralharuspex Ceccolini and Cianferoni 2023
+
†Uralharuspex latisiphonatus Shimansky 1968
Invalid names: Haruspex [replaced]
G. †Vericeras
G. †Zhuralevia
Invalid names: Michelinoceratida Flower and Kummel 1950 [synonym], Orthodochmiocerataceae Chen et al. 1981 [empty], Sinoceratida Kobayashi 1958 [synonym], Sphaerortoceratidae Ristedt 1968 [empty]
Fm. †Paraphragmitidae Flower 1950
+
G. †Calocyrtoceras Foerste 1936
G. †Cyrtocycloceras Foerste 1936
G. †Lyecoceras Mutvei 1957
G. †Paraphragmites Flower 1943
Fm. †Protobactritidae Chen et al. 1981
+
G. †Protobactrites Hyatt 1900
+
†Protobactrites clinatus Chen et al. 1981
†Protobactrites compressus Chen et al. 1981
†Protobactrites densus Chen et al. 1981
†Protobactrites heshuiensis Chen et al. 1981
†Protobactrites leijitunensis Chen et al. 1981
†Protobactrites loumianensis Chen et al. 1981
†Protobactrites rectus Chen et al. 1981
†Protobactrites rongxiensis Chen et al. 1981
†Protobactrites styloideum Barrande 1874
†Protobactrites subquadratus Chen et al. 1981
Invalid names: Riocerida King and Evans 2019 [empty]
Diagnosis
No diagnoses are available