Classification of the order Orthida

Or. †Orthida Schuchert and Cooper 1932
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Subor. †Dalmanellidina Moore 1952
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Superfm. †Dalmanelloidea Schuchert 1913
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Fm. †Angusticardiniidae Schuchert and Cooper 1931
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G. †Angusticardinia Schuchert and Cooper 1931
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Angusticardinia recta Pander 1830
Angusticardinia striata Pander 1830
Fm. †Dalmanellidae Schuchert 1913
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G. †Cincinnetina Jin 2012
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Cincinnetina meeki Miller 1875
Subfm. †Cortezorthinae Johnson and Talent 1967
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Cariniferella alleni Cooper and Dutro, Jr. 1982
Cariniferella costellata Cooper and Dutro, Jr. 1982
Cariniferella iowensis Stainbrook 1945
G. †Cortezorthis Johnson and Talent 1967
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Cortezorthis cortezensis Johnson and Talent 1967
G. †Reeftonia
G. †Crassiorina Havlíček 1950
G. †Dalmanella Hall and Clarke 1892
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Subg. †Dalmanella (Isorthis) Kozlowski 1929
Subg. †Dalmanella (Wattsella) Bancroft 1928
Dalmanella aluverensis Hints 1975
Dalmanella antisculpta Jin and Zhan 2008
Dalmanella bassleri Foerste 1909
Dalmanella cheesemani Williams 1962
Dalmanella cicatrica Appollonov et al. 1980
Dalmanella costellata Cooper 1956
Dalmanella cyclica Rubel 1962
Dalmanella edgewoodensis Savage 1913
Dalmanella federata Reed 1917
Dalmanella fertilis Ulrich 1909
Dalmanella frechi Fliegel 1901
Dalmanella horderleyensis Whittington 1938
Dalmanella humalaensis Hints 1975
Dalmanella kotyrzhalica Popov and Cocks 2014
Dalmanella modica Williams 1963
Dalmanella navis Opik 1930
Dalmanella parva Williams 1949
Dalmanella pectinoides Bergström 1968
Dalmanella portranensis Wright 1964
Dalmanella sculpta Cooper 1956
Dalmanella subquadrata Fliegel 1900
Dalmanella sulcata Cooper 1956
Dalmanella testudinaria Dalman 1828
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Invalid names: Dalmanella biconvexa Williams 1951 [synonym]
Dalmanella unguis Sowerby and Murchison 1839
G. †Dalmanellid Owen and Harper 1982
Subfm. †Dalmanellinae Schuchert 1913
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G. †Bancroftina Sinclair 1946
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Bancroftina bouceki Havlicek 1950
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Cryptothyris magnifica Cocks 2014
G. †Eremotrema Cooper 1956
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Eremotrema biconvexum Cooper 1956
Eremotrema gracilis Reed 1917
Eremotrema paucicostellatum Mitchell 1977
G. †Howellites Bancroft 1945
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Howellites aenigmus Nikiforova 1985
Howellites amsdeni Savage 1981
Howellites hibernicus Liljeroth et al. 2017
Howellites wesenbergensis Alichova 1951
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Invalid names: Dalmanella wesenbergensis Wysogorski 1900 [replaced]
G. †Mirorthis
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Mirorthis mira Zeng 1983
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Onnizetina calapujensis Villas et al. 2015
G. †Paucicrura Cooper 1956
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Paucicrura corpulenta Sardeson 1892
Paucicrura cristata Cooper 1956
Paucicrura cristifera Cooper 1956
Paucicrura eximia Williams 1962
Paucicrura fistulosa Jin and Zhan 2008
Paucicrura navis Opik 1930
Paucicrura plana Hints 1975
Paucicrura robusta Hints 1975
Paucicrura rogata Sardeson 1897
Paucicrura sila Williams 1962
Paucicrura subplana Cooper 1956
Paucicrura tuloinensis Rozman and Severgina 1983
Invalid names: Cristiferina Cooper 1956 [synonym], Sigopallus [synonym]
G. †Ravozetina Havlícek 1974
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Ravozetina honorata Barrande 1879
G. †Wysogorskiella Hints 1975
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Subfm. †Isorthinae Schuchert and Cooper 1931
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G. †Isorthis Kozlowski 1929
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Subg. †Isorthis (Arcualla) Walmsley and Boucot 1975
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Isorthis (Arcualla) arcuaria Hall and Clarke 1892
Isorthis (Arcualla) microscapha Johnson et al. 1976
Subg. †Isorthis (Isorthis) Kozlowski 1929
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Subg. †Isorthis (Ovalella) Walmsley and Boucot 1975
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Isorthis (Ovalella) mackenziei Boucot et al. 1966
Isorthis (Ovalella) natiscotekia Li and Copper 2006
Subg. †Isorthis (Protocortezorthis) Walmsley and Boucot 1975
Isorthis alpha Gill 1949
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Invalid names: Cariniferella beta Gill 1949 [synonym]
Isorthis bailyi Wright 1964
Isorthis crassa Lindström 1861
Isorthis estona Alichova 1953
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Invalid names: Dalmanella estona Wysogorski 1900 [synonym]
Isorthis festiva Philip 1962
Isorthis loveni Lindström 1861
Isorthis mediocra Rubel 1962
Isorthis parvulus Rybnikova 1967
Isorthis pygmaea Dunbar 1919
Isorthis slitensis Walmsley 1965
G. †Levenea Schuchert and Cooper 1931
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Levenea canaliculata Lindström 1861
Levenea fagerholmi Johnson 1970
Levenea llandoveriana Williams 1951
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Invalid names: Levenea huadongensis Zeng and Hu 1997 [synonym], Levenea prima Walmsley and Boucot 1975 [synonym]
Levenea media Shaler 1865
Levenea mera Li and Copper 2006
Levenea navicula Johnson 1970
Levenea qianbeiensis Rong et al. 1974
Levenea rica Li and Copper 2006
Levenea subcarinata Hall 1857
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Protocortezorthis windmillensis Johnson and Talent 1967
G. †Tyersella
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Tyersella typica Philip 1962
Invalid names: Isorthidae Schuchert and Cooper 1931 [replaced]
G. †Onniella Bancroft 1928
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Onniella acuta Hints 1975
Onniella bancrofti Lindström 1953
Onniella broeggeri Bancroft 1928
Onniella jonesi Davidson 1883
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Invalid names: Onniella sambrensis Sheehan 1987 [synonym]
Onniella kalvoya Cocks 1982
Onniella longa Hints 1975
Onniella navis Opik 1930
Onniella ostentata Williams 1963
Onniella pashkevichiusi Musteikis and Paskevicius 1999
Onniella perplexa Laurie 1991
Onniella plicata Howe 1965
Onniella quadrata Wang 1949
Onniella rava Marek and Havlíček 1967
Onniella sturensis Hints 1975
Onniella tricapitata Jin and Zhan 2008
Onniella trigona Rubel 1962
Onniella tyersensis Philip 1962
Onniella yichangensis Zeng 1983
Invalid names: Bagnorthis [synonym], Soudleyella [synonym]
Subfm. †Prokopiinae Wright 1965
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G. †Eoprokopia Baranov 2007
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Eoprokopia aequalis Baranov 2007
G. †Phragmophora Cooper 1955
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Phragmophora punctata Talent 1963
G. †Prokopia
Subfm. †Resserellinae Walmsley and Boucot 1971
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G. †Dedzetina
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Dedzetina major Cocks 2014
Dedzetina serpaglii Villas et al. 2002
Dedzetina silurica Racheboeuf and Villeneuve 1992
G. †Karlicium
G. †Resserella Bancroft 1928
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Resserella basalis Dalman 1828
Resserella canalis Sowerby 1839
Resserella elegantula Dalman 1828
Resserella impensa Philip 1962
Resserella matutina Baarli 1988
Resserella pirguensis Hints 1975
Resserella praeclara Cocks 2008
Resserella sabrinae Bassett 1972
Invalid names: Parmorthis [synonym]
G. †Visbyella Walmsley et al. 1968
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Visbyella concavoconvexa Twenhofel 1928
Visbyella pygmae Whittard and Parker 1950
Visbyella visbyensis Lindstrom 1861
Subfm. †Templeellinae Harper 2000
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G. †Templeella Rozman and Rong 1993
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Templeella gobiensis Rozman and Rong 1993
Fm. †Dicoelosiidae Cloud 1948
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G. †Dicoelosia King 1850
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Dicaelosia oklahomenesis Amsden 1956
Dicoelosia alticavata Whittard and Barker 1950
Dicoelosia anticipata Wright 1968
Dicoelosia baltica Musteikis and Puura 1983
Dicoelosia biloba Linnaeus 1758
Dicoelosia cathaysiensis Huang et al. 2013
Dicoelosia diversifrons Johnson et al. 1976
Dicoelosia indenta Cooper 1930
Dicoelosia inghami Wright 1968
Dicoelosia jonesridgensis Ross and Dutro 1966
Dicoelosia lata Wright 1964
Dicoelosia osloensis Wright 1968
Dicoelosia paralata Bassett 1972
Dicoelosia parvifrons Johnson et al. 1976
Dicoelosia simulata Mitchell 1977
Dicoelosia transversa Wright 1968
Dicoelosia varica Conrad 1842
Dicoelosia verneuiliana Beecher 1891
Invalid names: Bilobites Quenstedt 1869 [synonym]
G. †Epitomyonia Wright 1968
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Epitomyonia amplissima Zhang 1989
Epitomyonia clausula Johnson et al. 1976
Epitomyonia glypha Wright 1968
Epitomyonia pachytriseptata Zhang and Boucot 1988
Epitomyonia paucitropida Chen et al. 2008
Epitomyonia relicina Potter 1990
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Teichertina americana Johnson 1970
Fm. †Harknessellidae Bancroft 1928
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G. †Haymina Bogoyavlenskaya 1991
G. †Horderleyella Bancroft 1928
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Horderleyella chacaltanai Villas et al. 2015
Horderleyella fragilis Bergström 1968
G. †Isabelella Reyes-Abril et al. 2013
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Isabelella fascicostellata Reyes-Abril et al. 2013
G. †Kampella Baarli 1988
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Kampella guttula Baarli 1988
G. †Reuschella Bancroft 1928
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Reuschella americana Cooper 1956
Reuschella herreraensis Villas 1992
Reuschella horderleyensis Bancroft 1929
Reuschella inexpectata Temple 1968
Reuschella magna Hints 1975
Fm. †Heterorthidae Schuchert and Cooper 1931
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G. †Arenorthis Havlícek 1970
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Arenorthis arenaria Havlícek 1970
Arenorthis paranaensis Benedetto et al. 2013
G. †Cacemia
G. †Cilinella
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Heterorthella tondonensis Racheboeuf and Villeneuve 1992
G. †Heterorthina Bancroft 1928
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Heterorthina cybele Li and Copper 2006
Heterorthina kerfornei Melou 1975
Heterorthina macfarlani Neuman 1967
Heterorthina praeculta Bancroft 1928
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G. †Incorthis
G. †Svobodaina Havlicek 1951
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Svobodaina armoricana Babin and Mélou 1972
Svobodaina barnumosa Havlicek 1981
Svobodaina ellipsoides Barrande 1848
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Invalid names: Svobodaina inclyta Barrande 1879 [synonym]
Svobodaina feisti Havlicek 1981
Svobodaina havliceki Villas 1985
Svobodaina suburbana Barrande 1879
Invalid names: Planoharknessella [synonym]
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G. †Tarfaya
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Tarfaya grandis Harrington 1938
Tarfaya jafariani Popov et al. 2009
G. †Tissintia
Fm. †Hypsomoniidae Wright 1965
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Fm. †Kayserellidae Wright 1965
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Fm. †Mystrophoridae Schuchert and Cooper 1931
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Fm. †Paurorthidae Opik 1933
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G. †Paurorthina Rubel 1961
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Paurorthina resima Rubel 1961
G. †Paurorthis Schuchert and Cooper 1931
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Paurorthis fasciculata Cooper 1956
Paurorthis inflata Rubel 1961
Paurorthis inopinatus Baarli 1988
Paurorthis longa Cooper 1956
Paurorthis minima Pander 1830
Paurorthis parva Pander 1830
Paurorthis savalaensis Hints 1968
Paurorthis valida Rubel 1961
G. †Virgoria Neuman 1976
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Virgoria virgensis Neuman 1976
Fm. †Platyorthidae Harper et al. 1969
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G. †Diceromyonia Wang 1949
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Diceromyonia crassa Howe 1965
Diceromyonia storeya Okulitch 1943
Diceromyonia tersa Sardeson 1892
Invalid names: Diceromyonia ciona Li and Copper 2006 [nomen dubium]
G. †Eorhipidomella Hints 1971
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Eorhipidomella ovalis Hints 1971
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Marklandella markesi Baarli 1988
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Platyorthis ovalis Paskevicius 1962
G. †Proclinorthis Colmenar et al. 2013
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Proclinorthis vailhanensis Colmenar et al. 2013
Fm. †Proschizophoriidae Boucot et al. 1966
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G. †Baturria
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Cordatomyonia umangoensis Benedetto 1995
G. †Elegesta
G. †Idiorthis
Fm. †Rhipidomellidae Schuchert 1913
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Subfm. †Perditocardiniinae Williams et al. 2000
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G. †Loganella
Subfm. †Platyorthinae Harper et al. 1969
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G. †Elsaella Alichova 1960
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Elsaella bekkeri Rosenstein 1943
Subfm. †Rhipidomellinae Schuchert 1913
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G. †Aulacella
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Aulacella elliptica Cooper and Dutro, Jr. 1982
Aulacella manticula Stainbrook 1947
G. †Dalejina Havlicek 1953
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Dalejina hanusi Havlicek 1953
Dalejina hybrida Sowerby 1839
Dalejina junonis Li and Copper 2006
Dalejina phaseola Rubel 1963
Dalejina striata Jin et al. 1993
Invalid names: Rhipidomelloides [synonym]
G. †Discomyorthis Johnson 1970
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G. †Mendacella Cooper 1930
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Mendacella aerinensis Hints 2012
Mendacella bleikeriensis Baarli 1988
Mendacella borrbyensis Hints 1975
Mendacella circularis Rubel 2011
Mendacella lata Whittard and Barker 1950
Mendacella megacircularis Jin and Zhan 2008
Mendacella mullockiensis Davidson 1869
Mendacella phiala Whittard and Barker 1950
Mendacella sola Billings 1866
Mendacella uberis Billings 1866
Mendacella udauberis Li and Copper 2006
G. †Permorhipidomella He et al. 2019
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Permorhipidomella ovatus He et al. 2019
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Rhipidomella carbonaria Shumard and Swallow 1858
Rhipidomella caucasica Kotlyar et al. 2004
Rhipidomella cora d'Orbigny 1842
Rhipidomella corallina Waagen 1884
Rhipidomella cordialis Grant 1976
Rhipidomella diminutiva Rowley 1900
Rhipidomella dubia Hall 1856
Rhipidomella dzhuvankarensis Besnossova 1968
Rhipidomella fortimuscula Cvancara 1958
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Invalid names: Rhipidomella lengwuensis Liang 1990 [synonym], Rhipidomella pusilla Liang 1990 [synonym]
Rhipidomella hispidula Cooper and Grant 1976
Rhipidomella jerseyensis Weller 1914
Rhipidomella lyelliana De Koninck 1851
Rhipidomella magna Tazawa 2016
Rhipidomella miaolingensis Lee and Gu 1980
Rhipidomella michelini Hall and Clarke 1892
Rhipidomella miscella Cooper and Grant 1976
Rhipidomella obesiconcha Lazarev 1977
Rhipidomella orthogonia Lazarev 1977
Rhipidomella parva Lee et al. 2010
Rhipidomella parvula He et al. 2019
Rhipidomella pecosi Marcou 1858
Rhipidomella penniana Derby 1874
Rhipidomella perminuta Girty 1926
Rhipidomella pressula Lazarev 1977
Rhipidomella subcircularis Shen and He 1994
Rhipidomella thiemei White 1880
Rhipidomella uralica Tschernyschew 1902
Rhipidomella vanuxemi Hall 1857
Rhipidomella vediensis Sokolskaja 1965
G. †Stainbrookia Cooper and Dutro, Jr. 1982
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Stainbrookia infera Calvin 1878
Stainbrookia rotunda Cooper and Dutro, Jr. 1982
G. †Strixella
G. †Thiemella
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Thiemella platys Cooper and Dutro, Jr. 1982
Thiemella quadrata Cooper and Dutro, Jr. 1982
Fm. †Tyronellidae Mitchell 1977
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G. †Tyronella Mitchell 1977
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Tyronella killeyensis Mitchell 1977
Tyronella siugensis Hints 2012
Invalid names: Portranellidae Williams et al. 2000 [empty]
Superfm. †Enteletoidea Waagen 1884
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Fm. †Chrustenoporidae Baarli 1988
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G. †Dysprosorthis Rong 1984
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G. †Jezercia Havlicek and Mergl 1982
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Jezercia chrustenicensis Havlicek 1951
Jezercia ostiaria Havlicek and Mergl 1982
Jezercia rongi Baarli 1988
Jezercia wrighti Havlicek 1977
G. †Wangyuella Zhan and Rong 1995
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Wangyuella ventribiconvexa Zhan and Rong 1995
Fm. †Draboviidae Havlicek 1950
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G. †Destombesium Havlicek 1971
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Destombesium ellipsoides Havlicek 1971
Destombesium pacochicoensis Havlicek and Branisa 1980
Destombesium zagoraensis Havlicek 1971
Subfm. †Draboviinae Havlicek 1950
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G. †Boticium
G. †Diorthelasma Cooper 1956
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Diorthelasma parvum Cooper 1956
Diorthelasma semotum Baarli 1988
Diorthelasma weissi Rice 1987
G. †Draborthis Marek and Havlíček 1967
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Draborthis caelebs Marek and Havlíček 1967
G. †Drabovia Havlicek 1950
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Drabovia agnata Marek and Havlíček 1967
Drabovia minuta Hints 2012
Drabovia redux Barrande 1848
Drabovia undulata Astini and Benedetto 1992
Drabovia westrogothica Bergström 1968
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Drabovinella curiosa Havlicek and Branisa 1980
Drabovinella erratica Davidson 1869
Drabovinella minuscula Villas et al. 2015
G. †Fascifera Ulrich and Cooper 1942
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Fascifera stonensis Safford 1869
Fascifera subcarinata Ulrich and Cooper 1942
G. †Hirnantia Lamont 1935
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Hirnantia kinnelloides Havlicek 1977
Hirnantia magna Rong et al. 1974
Hirnantia noixella Amsden 1974
Hirnantia sagittifera McCoy 1851
Hirnantia transgrediens Havlicek 1950
Invalid names: Villicundella [synonym]
G. †Kinnella Bergström 1968
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Kinnella kielanae Temple 1965
Kinnella laurentiana Stott and Jin 2007
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Nocturnellia praedux Arbin et al. 1978
G. †Oanduporella Hints 1975
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Oanduporella kuskokwimensis Rasmussen et al. 2012
Oanduporella ruida Billings 1866
G. †Orthiella
G. †Pionodema Foerste 1912
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Pionodema aberstadti Howe 1988
Pionodema cooperi Steele and Sinclair 1971
Pionodema costata Hints 1975
Pionodema dubia Hints 1975
Pionodema girvaniensis Davidson 1868
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Invalid names: Pionodema thomsoni Reed 1917 [synonym]
Pionodema hypermeca Li and Copper 2006
Pionodema minuscula Willard 1928
Pionodema opima Popov et al. 2002
Pionodema subaequata Conrad 1843
G. †Salopina Boucot 1960
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Salopina brandi Cocks 1979
Salopina conservatrix McLearn 1924
Salopina delta Johnson et al. 1976
Salopina lunata Sowerby 1839
Salopina ordovicica Mitchell 1977
Salopina pumila Baarli 1988
Salopina sanjuanensis Benedetto et al. 1992
Salopina submedia McLearn 1924
Salopina tubulata Lindström 1861
Invalid names: Salopinella [synonym]
G. †Tunariorthis Benedetto 2014
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Tunariorthis cardocanalis Havlicek and Branisa 1980
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Invalid names: Tunariorthis cocksi Benedetto 2013 [synonym]
Invalid names: Tunaria Benedetto 2013 [replaced]
Subfm. †Monelasmiinae Williams et al. 2000
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Monelasmina recta Wang 1985
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Muriferella masurskyi Johnson and Talent 1967
G. †Vallomyonia Johnson 1966
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Vallomyonia devonica Walcott 1884
Fm. †Enteletidae Waagen 1884
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G. †Camerenteletes Shen and Shi 2007
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Camerenteletes enteletoides Shen and Shi 2007
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Enteletella nikschitchi Licharew 1925
G. †Enteletes
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Enteletes acutiplicatus Hayasaka 1932
Enteletes andii d'Orbigny 1842
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Invalid names: Terebratula gaudryi d'Orbigny 1842 [synonym]
Enteletes andrewsi Grabau 1931
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Invalid names: Enteletes obesa Grabau 1931 [synonym]
Enteletes angulatus Girty 1909
Enteletes asymmatrosis Xu and Grant 1994
Enteletes bowsheri Cooper and Grant 1976
Enteletes carnica Schellwien 1892
Enteletes carniolicus Schellwien 1900
Enteletes conjunctus Reed 1944
Enteletes contractus Gemmellaro 1899
Enteletes costellatus Cooper and Grant 1976
Enteletes densus Cooper and Grant 1976
Enteletes dieneri Schellwien 1900
Enteletes dumblei Girty 1909
Enteletes dzhagrensis Sokolskaja 1965
Enteletes elegans Gemmellaro 1899
Enteletes exiguus Cooper and Grant 1976
Enteletes ferrugineus Waagen 1884
Enteletes geniculatus Licharew 2002
Enteletes gibbosus Chronic 1949
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Invalid names: Enteletes bisulcata Liao and Meng 1986 [synonym], Enteletes xiziensis Liang 1990 [synonym]
Enteletes globosus Girty 1909
Enteletes granti Waterhouse and Gupta 1983
Enteletes haugi Gemmellaro 1899
Enteletes hemiplicata Hall 1852
Enteletes imperans De Gregorio 1930
Enteletes kayseri Waagen 1884
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Invalid names: Enteletes subaequivalioides Liang 1990 [synonym]
Enteletes laevissimus Waagen 1884
Enteletes lamarcki Fischer de Waldheim 1825
Enteletes lateroplicatus Fantini Sestini and Glaus 1966
Enteletes liumbonus King 1931
Enteletes lukouensis Yang 1977
Enteletes meridionalis Gemmellaro 1899
Enteletes merzbacheri Keidel 1906
Enteletes microplocus Gemmellaro 1899
Enteletes mioplicata Zhao and Tan 1984
Enteletes multiplicatus Zeng et al. 1995
Enteletes najae Fredericks 1925
Enteletes nucleolus Grabau 1931
Enteletes obscura Jin and Ye 1979
Enteletes obsoletus Gemmellaro 1899
Enteletes oehlerti Gemmellaro 1899
Enteletes pentameroides Waagen 1884
Enteletes plummeri King 1931
Enteletes retardata Huang 1933
Enteletes rotundobesus Cooper and Grant 1976
Enteletes salopeki Sremac 1986
Enteletes singularis Reed 1944
Enteletes socialis Reed 1944
Enteletes stehlii Cooper and Grant 1976
Enteletes subaequivalvis Gemmellaro 1899
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Invalid names: Meekella sparsiplicata He and Shi 2014 [synonym]
Enteletes subcircularis Cooper and Grant 1976
Enteletes subnudus Cooper and Grant 1976
Enteletes subobesa Grabau 1931
Enteletes tenuistriatus Maslennikov 1935
Enteletes transversus Zeng 1993
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Invalid names: Enteletes dieneri Gemmellaro 1899 [objective synonym], Enteletes milleplicata Liang 1990 [synonym], Enteletes zhejiangensis Liang 1990 [synonym], Enteletes zhexiensis Liang 1990 [synonym]
Enteletes tschernyschewi Gemmellaro 1899
Enteletes waageni Gemmellaro 1899
Enteletes wannanensis Zhang and Jin 1961
Enteletes wordensis King 1931
Invalid names: Enteletes huadongensis Liang 1990 [nomen dubium], Punctoproductus eximius Liang 1990 [nomen dubium]
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Enteletina acuteplicata Waagen 1884
Enteletina latesinuatus Waagen 1884
Enteletina mirabilis Mansuy 1913
Enteletina sublaevis Waagen 1884
Enteletina suessi Schellwien 1892
Enteletina undata Jin and Liao 1975
G. †Enteletoides Stuckenberg 1905
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Enteletoides redux Reed 1944
G. †Mapingtichia Li 1986
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G. †Parenteletes King 1931
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Parenteletes cooperi King 1931
Parenteletes superbus Cooper and Grant 1976
G. †Peltichia Jin and Liao 1981
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Peltichia akasakensis Ozawa 1927
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Invalid names: Enteletes minoensis Hayasaka 1932 [synonym]
Peltichia ruzhencevi Sokolskaja 1965
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Invalid names: Peltichia nachodkensis Kotlyar 1989 [synonym]
Peltichia sinensis Huang 1933
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Invalid names: Enteletina pengshuiensis Tong 1978 [synonym]
Peltichia subtriangularis Shen et al. 1999
Peltichia transversa Huang 1933
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Invalid names: Peltichia planisinosa Liang 1990 [synonym], Peltichia schizoloides Xu and Grant 1994 [synonym]
Peltichia zigzag Huang 1933
Fm. †Linoporellidae Schuchert and Cooper 1931
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+
Elasmothyris limata Potter 1990
G. †Laticrura Cooper 1956
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Laticrura erecta Wright 1964
Laticrura inconstans Reed 1917
Laticrura magna Cooper 1956
Laticrura pionodema Cooper 1956
Laticrura rostrata Hints 1975
G. †Leptoskelidion Amsden 1974
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Leptoskelidion loci Cocks 1982
G. †Linoporella Schuchert and Cooper 1931
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Linoporella punctata deVerneuil 1848
G. †Salopia Williams 1955
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Salopia gracilis Williams 1955
Salopia salteri Davidson 1869
Invalid names: Salopia salteri gracilis Williams 1955 [synonym]
Fm. †Saukrodictyidae Wright 1964
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G. †Callositella Rasmussen et al. 2012
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Callositella cheeneetnukensis Rasmussen et al. 2012
G. †Hulterstadia Wright 1993
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Hulterstadia cor Wiman 1907
G. †Saukrodictya Wright 1964
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Saukrodictya hibernica Wright 1964
Saukrodictya philipi Davidson 1883
Saukrodictya porosa Havlicek 1968
Saukrodictya reticula Vinassa 1927
Saukrodictya tormoensis Villas 1992
Saukrodictya wrighti Sheehan 1987
Fm. †Schizophoriidae Schuchert and Le Vene 1929
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G. †Acosarina Cooper and Grant 1969
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Acosarina antesulcata Waterhouse 1983
Acosarina baylorensis King 1931
Acosarina circular Xu 1987
Acosarina dorashamensis Sokolskaja 1965
Acosarina dunbari Cooper and Grant 1976
Acosarina fecunda Liao 1979
Acosarina grandis Chen and Shi 2006
Acosarina incisiva Waagen 1884
Acosarina janiceps Waagen 1884
Acosarina juresanensis Tschernyschew 1902
Acosarina mesoplatys King 1931
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Invalid names: Rhipidomella leonardensis King 1931 [synonym], Rhipidomella transversa King 1931 [synonym]
Acosarina minuta Abich 1878
+
Invalid names: Acosarina dorsisulcata Cooper and Grant 1969 [synonym], Acosarina kanmerai Yanagida and Nakornsri 1999 [synonym], Kotlaia capillosa Grant 1993 [synonym], Orthis indica Waagen 1884 [synonym], Sunacosarina campana Liang 1990 [synonym]
Acosarina peculiaris Girty 1931
Acosarina rectimarginata Cooper and Grant 1976
Acosarina regularis Liao 1980
Acosarina tumita Zeng et al. 1995
Invalid names: Sunacosarina Liang 1990 [synonym]
G. †Kotlaia Grant 1993
+
Kotlaia aethopa Grant 1993
Kotlaia bistriata Reed 1944
Kotlaia strophiria Xu and Grant 1994
Kotlaia waterhousei Grant 1976
G. †Orthotichia Hall and Clarke 1892
+
Orthotichia altilis Liang 1990
Orthotichia avushensis Sokolskaja 1965
Orthotichia derbyi Waagen 1884
Orthotichia hueconiana Girty 1929
Orthotichia irregularis Cooper and Grant 1976
Orthotichia japonica Hayasaka 1932
Orthotichia jiangxiensis Hu and Jin 1982
Orthotichia magnifica Grabau 1936
Orthotichia marmorea Waagen 1884
Orthotichia morganiana Derby 1874
Orthotichia nana Grabau 1931
Orthotichia newelli Cooper and Grant 1976
Orthotichia parva Sokolskaja 1965
Orthotichia pentamera Eichwald 1860
Orthotichia sulcata Reed 1944
+
Invalid names: Orthotichia venterconvexa Liang 1990 [synonym]
Orthotichia trigona Yang 1977
G. †Schizophoria King 1850
+
Orthis (Schizophoria) iowensis Hall and Clarke 1892
Subg. †Schizophoria (Schizophoria) King 1850
+
+
Invalid names: Schizophoria (Schizophoria) meeki Fenton and Fenton 1928 [synonym]
Schizophoria (Schizophoria) magna Fenton and Fenton 1924
Schizophoria amanaensis Stainbrook 1945
Schizophoria annanaensis Stainbrook 1945
Schizophoria depressa Easton 1962
Schizophoria kintaensis Shi and Waterhouse 1991
Schizophoria lata Stainbrook 1940
Schizophoria nevadaensis Merriam 1940
Schizophoria paraprima Johnson et al. 1973
Schizophoria resupinata Martin 1809
Schizophoria striatula von Schlotheim 1813
Schizophoria striatula Girty 1900
Schizophoria supracarbonica Tschernyschew 1902
Schizophoria swallovi Weller 1914
Schizophoria tani Huang 1933
Schizophoria upensis Sarycheva and Sokolskaja 1952
Schizophoria verulamensis Cvancara 1958
Schizophoria vulvaria von Schlotheim 1820
G. †Fehamya Mergl 1983
G. †Glypterina Boucot 1970
G. †Kundatella Aksarina 1978
G. †Oleorthis Havlicek 1968
Subor. †Orthidina Schuchert and Cooper 1932
hide
Superfm. †Orthoidea Woodward 1852
+
Fm. †Anomalorthidae Ulrich and Cooper 1936
+
G. †Alimbella Andreeva 1960
G. †Anomalorthis Ulrich and Cooper 1936
+
Anomalorthis rossi Hansen and Holmer 2011
Anomalorthis utahensis Ulrich and Cooper 1936
G. †Medessia
Fm. †Archaeorthidae Williams et al. 2007
+
G. †Archaeorthis Schuchert and Cooper 1931
+
Archaeorthis altaica Rozman and Severgina 1983
Archaeorthis christianiae Kjerulf 1865
Archaeorthis electra Billings 1865
Archaeorthis globosa Williams and Curry 1985
Archaeorthis groenlandica Poulsen 1937
Archaeorthis major Nikitina et al. 2006
Archaeorthis wimani Walcott 1905
G. †Cyrtonotella Schuchert and Cooper 1931
+
Cyrtonotella kuckersiana Wysogorski 1900
+
+
Invalid names: Orthis laine Opik 1930 [synonym]
Cyrtonotella semicircularis Eichwald 1829
G. †Diplonorthis Mitchell 1972
+
Diplonorthis portlocki Mitchell 1977
G. †Nicoloidea Zeng 1987
G. †Nothorthis Ulrich and Cooper 1938
+
Nothorthis delicatula Ulrich and Cooper 1938
Nothorthis marginata Benedetto et al. 2003
Nothorthis perplexa Xu and Liu 1984
Nothorthis subpyramidalis Hansen and Holmer 2011
Nothorthis tarda Cooper 1956
Nothorthis tarda lata Williams 1962
G. †Pleurorthis Cooper 1956
+
Invalid names: Ambardella [synonym]
G. †Riograndella Kobayashi 1937
G. †Xinanorthis Xu and Liu 1974
Fm. †Bohemiellidae Havlicek 1977
+
G. †Bohemiella Schuchert and Cooper 1931
+
Bohemiella romingeri Barrande 1848
Invalid names: Shiragia [synonym]
G. †Cymbricia Roberts and Jell 1990
+
Cymbricia spinicostata Roberts and Jell 1990
G. †Diraphora
+
Diraphora dyunyin Kruse 1990
G. †Murrinyinella Kruse 1990
+
Murrinyinella garradin Kruse 1990
G. †Oligomys
G. †Wimanella Walcott 1908
+
Wimanella maladensis Resser 1939
Wimanella nautes Walcott 1912
Wimanella rara Walcott 1908
Wimanella seges Kruse 1990
Wimanella simplex Walcott 1908
Wimanella spencei Walcott 1912
Wimanella tricavata Roberts and Jell 1990
Fm. †Cathaysiorthidae Rong et al. 2013
+
G. †Asturorthis Villas and Cocks 1996
G. †Cathaysiorthis Rong et al. 2008
+
Cathaysiorthis enorme Laurie 1991
Cathaysiorthis yushanensis Zeng and Hu 1997
Fm. †Glyptorthidae Schuchert and Cooper 1931
+
G. †Bassettella Zykov and Butts 2008
+
Bassettella alata Hints 2010
Bassettella gracilis Zykov and Butts 2008
G. †Eridorthis Foerste 1909
+
Eridorthis australis Percival 1991
Eridorthis inexpecta Cooper 1956
Eridorthis nicklesi Foerste 1909
Eridorthis rocklandensis Wilson 1946
G. †Glyptorthis Foerste 1914
+
Glyptorthis alta Cooper 1956
Glyptorthis assimilis Cooper 1956
Glyptorthis balclatchiensis Davidson 1883
Glyptorthis balcletchiensis Davidson 1883
Glyptorthis bellarugosa Conrad 1843
Glyptorthis bellatula Cooper 1956
Glyptorthis costellata Cooper 1956
Glyptorthis crenulata Cooper 1956
Glyptorthis crispa M'Coy 1846
Glyptorthis crispata Emmons 1842
Glyptorthis daytonensis Foerste 1887
Glyptorthis equiconvexa Cooper 1956
Glyptorthis fausta Foerste 1887
Glyptorthis glaseri Alberstadt 1973
Glyptorthis glypta Cooper 1956
Glyptorthis imbrex Havlicek and Branisa 1980
Glyptorthis irregularis Cooper 1956
Glyptorthis irrupta Rubel 1962
Glyptorthis marilara Li and Copper 2006
Glyptorthis maritima Wright 1964
Glyptorthis obesa Cooper 1956
Glyptorthis plana Rõõmusoks 1964
Glyptorthis pulchra Wang 1949
Glyptorthis sarcina Zhan and Jin 2005
Glyptorthis senecta Cooper 1956
Glyptorthis splendens Cocks 2014
Glyptorthis squamata Rõõmusoks 1964
Glyptorthis sulcata Cooper 1956
Glyptorthis uncinata Cooper 1956
Glyptorthis uniformis Cooper 1956
+
Invalid names: Glyptorthis virginica Cooper 1956 [synonym]
Glyptorthis vidari Baarli 1995
+
Lomatorthis mimula Williams and Curry 1985
G. †Parisorthis Zhan and Jin 2005
+
Parisorthis dischidanteris Zhan and Jin 2005
G. †Spinorthis Wright 1964
+
Spinorthis geniculata Wright 1964
Fm. †Hesperonomiidae Ulrich and Cooper 1936
+
G. †Hesperonomia Ulrich and Cooper 1936
+
Hesperonomia orientalis Benedetto 1998
Hesperonomia planidorsalis Ulrich and Clarke 1936
Hesperonomia uzunbulakensis Nikitina et al. 2006
+
Hesperonomiella arcuata Benedetto 2003
Hesperonomiella uzunbulakensis Nikitina et al. 2006
Invalid names: Engenella [synonym]
G. †Mollesella Benedetto 2003
+
Mollesella planiventralis Benedetto 2003
G. †Monorthis
+
Monorthis menapiae Davidson 1868
Monorthis transversa Benedetto 2003
+
Protohesperonomia resupinata Williams and Curry 1985
G. †Treioria
+
Treioria chaulioda Neuman and Bates 1978
G. †Zhanorthis Popov and Cocks 2017
+
Zhanorthis gerdkuhensis Popov and Cocks 2017
Fm. †Hesperorthidae Schuchert and Cooper 1931
+
G. †Barbarorthis Opik 1934
+
Barbarorthis laurentina Billings 1857
Barbarorthis porkuniensis Oraspold 1959
G. †Dolerorthis Schuchert and Cooper 1931
+
Dolerorthis flabellites Foerste 1889
Dolerorthis intercostata de Sowerby and Murchison 1839
Dolerorthis interplicata Foerste 1909
Dolerorthis multicostellata Rong et al. 2013
Dolerorthis nadruvensis Paškevičius and Hints 2016
Dolerorthis plicata de Sowerby and Murchison 1839
Dolerorthis praeclara Temple 1968
Dolerorthis pristina Popov et al. 2002
Dolerorthis psygma Lamont and Gilbert 1945
Dolerorthis rankini Davidson 1883
Dolerorthis rustica Sowerby 1839
Dolerorthis savagei Amsden 1974
Dolerorthis sowerbyana Davidson 1871
Dolerorthis sowerbyiana Davidson 1869
Invalid names: Altaeorthis Severgina 1967 [synonym], Munhella Neuman 1971 [synonym]
G. †Flabellitesia Zhang 1989
+
Flabellitesia adaia Li and Copper 2006
Flabellitesia kessei Boucot et al. 1988
G. †Hesperorthis Schuchert and Cooper 1931
+
Hesperorthis australis Cooper 1956
Hesperorthis avalanchensis Jin and Chatterton 1997
Hesperorthis barbata Percival 1991
Hesperorthis costalis Hall 1847
Hesperorthis davidsoni deVerneuil 1848
Hesperorthis gotlandica Schuchert and Cooper 1932
Hesperorthis ignicula Raymond 1905
Hesperorthis leinsterensis Liljeroth et al. 2017
Hesperorthis martinssoni Bassett and Cocks 1974
Hesperorthis mucronata Oraspold 1959
Hesperorthis onniensis Whittard and Barker 1950
Hesperorthis pyramidalis deVerneuil 1848
Hesperorthis rae Oraspold 1956
Hesperorthis tricenaria Conrad 1843
G. †Lordorthis Ross 1959
+
Lordorthis variabilis Ross 1959
G. †Ptychopleurella Schuchert and Cooper 1931
+
Ptychopleurella aleksandrovae Nikitin et al. 1996
Ptychopleurella angulaticostata Jin and Chatterton 1997
Ptychopleurella bouchardi Davidson 1847
Ptychopleurella decretoria Percival 1991
Ptychopleurella erecta Rubel 1962
Ptychopleurella lamellosa Raymond 1905
Ptychopleurella lapworthi Davidson 1883
+
Invalid names: Glyptorthis biornata Cowper Reed 1945 [synonym]
Ptychopleurella lenzi Zhang 1989
Ptychopleurella multicostata Whittard and Barker 1950
Ptychopleurella pirguensis Rõõmusoks 1964
Ptychopleurella porcia Billings 1859
Ptychopleurella separata Wright 1964
+
Schizonema capillatum Temple 1970
Schizonema fissistriata Foerste 1912
Invalid names: Schizoramma Foerste 1912 [objective synonym]
Fm. †Lycophoriidae Schuchert and Cooper 1931
+
G. †Lycophoria Lahusen 1885
+
Lycophoria globosa Eichwald 1829
Lycophoria lamanskii Rubel 1961
Lycophoria longissima Pander 1830
Lycophoria nucella Dalman 1828
Fm. †Orthidae Woodward 1852
+
G. †Almadenorthis Reyes-Abril et al. 2010
+
Almadenorthis auriculata Reyes-Abril et al. 2010
G. †Bastamorthis Ghobadi Pour et al. 2011
+
Bastamorthis multicostata Ghobadi Pour et al. 2011
G. †Boreadorthis Opik 1934
+
Boreadorthis crassa Opik 1934
Boreadorthis recula Opik 1934
Boreadorthis sheehani Cocks 2014
+
Diochthofera conspicua Potter 1990
G. †Duolobella Rasmussen et al. 2012
+
Duolobella sandiae Rasmussen et al. 2012
G. †Gutiorthis Reyes-Abril et al. 2010
+
Gutiorthis incurvata Reyes-Abril et al. 2010
G. †Lenorthis Andreeva 1955
G. †Leoniorthis Egerquist 2003
+
Leoniorthis robusta Hints 2014
Leoniorthis rubeli Hints 2014
G. †Orthambonites Pander 1830
+
Orthambonites aequalis Pander 1830
Orthambonites angulatus Cooper 1956
+
Invalid names: Orthambonites lata Pander 1830 [synonym], Orthambonites rotunda Pander 1830 [synonym]
Orthambonites exfoliata Raymond 1905
Orthambonites exopunctata Williams 1974
Orthambonites fundata Rubel 1961
Orthambonites novitas Opik 1939
Orthambonites tuvensis Andreeva 1982
Subfm. †Orthinae Woodward 1852
+
G. †Krattorthis Jaanusson and Bassett 1993
+
Krattorthis verneuili Rubel 1961
G. †Sivorthis Jaanusson and Bassett 1993
+
Sivorthis bellus Cooper 1956
Sivorthis calatravaensis Reyes-Abril et al. 2010
Sivorthis eucharis Ulrich and Cooper 1938
Sivorthis filistera Jaanusson and Bassett 1993
Sivorthis minus Cooper 1956
Sivorthis minutus Cooper 1956
Sivorthis noctilio Sharpe 1849
Sivorthis occidentalis Cooper 1956
Sivorthis precordillerana Benedetto 2015
Sivorthis tenuicostatus Cooper 1956
G. †Turanorthis Nikitina et al. 2006
+
Turanorthis kujandensis Nikitina et al. 2006
G. †Orthis Dalman 1828
+
Subg. †Orthis (Finkelnburgia) Walcott 1905
Orthis acuminata Billings 1859
Orthis australis M'Coy 1847
Orthis berthoisi Davidson 1869
Orthis biforata Nicholson 1875
Orthis biforata reversata Foerste 1885
Orthis bilobata Portlock 1843
Orthis callactis Dalman 1827
Orthis christianae Kjerulf 1865
Orthis christianiae Kjerulf 1865
Orthis decipiens Phleger, Jr. 1933
Orthis expansa de Sowerby and Murchison 1839
Orthis intercostata de Sowerby and Murchison 1839
Orthis laurentina Billings 1857
Orthis piger Billings 1859
Orthis praeumbona Hall 1857
Orthis reversa McCoy 1862
Orthis spinigera M'Coy 1847
Orthis testudinaria Dalman 1828
G. †Palaeowingella Rasmussen et al. 2012
+
Palaeowingella farewellensis Rasmussen et al. 2012
G. †Paralenorthis Havlicek and Branisa 1980
+
Paralenorthis alabamensis Ulrich and Cooper 1938
Paralenorthis alata de Sowerby and Murchison 1839
+
Invalid names: Lenorthis carausii Davidson 1868 [synonym]
Paralenorthis buttsi Schuchert and Cooper 1932
Paralenorthis carlottoi Gutiérrez−Marco and Villas 2007
Paralenorthis costata Zhan et al. 2014
Paralenorthis estenaensis Reyes-Abril et al. 2010
Paralenorthis immitatrix Havlicek and Branisa 1980
Paralenorthis lolae Reyes-Abril et al. 2010
Paralenorthis luritjaorum Jakobsen et al. 2014
Paralenorthis marshalli Wilson 1926
Paralenorthis minusculus Phleger, Jr. 1933
Paralenorthis mollesensis Levy and Nullo 1973
Paralenorthis panderania Hall and Clarke 1892
Paralenorthis proava Salter 1866
Paralenorthis rgaitensis Nikitina 1985
Paralenorthis riojanus Levy and Nullo 1973
Paralenorthis robustus Neuman 1964
Paralenorthis semnanensis Popov et al. 2009
Paralenorthis serica Chang 1934
Paralenorthis suriensis Benedetto 2003
Invalid names: Orthis calligramma chinensis Chang 1934 [synonym]
G. †Rogorthis Hints 2014
+
Rogorthis pakriensis Rubel 1961
G. †Sinorthis
+
Invalid names: Yichangorthis [synonym]
G. †Sulevorthis Jaanusson and Bassett 1993
+
Sulevorthis bielsteini Cooper 1956
Sulevorthis blountensis Cooper 1956
Sulevorthis cessatus Williams 1963
Sulevorthis exopunctatus Williams 1974
Sulevorthis lyckholmiensis Wysogorski 1900
Sulevorthis playfairi Reed 1917
G. †Suriorthis Benedetto 2003
+
Suriorthis depressus Benedetto 2003
G. †Taphrorthis Cooper 1956
+
Taphrorthis aspera Williams 1962
Taphrorthis bellatrix Reed 1917
Taphrorthis emarginata Cooper 1956
Taphrorthis guizhouensis Xu and Liu 1984
+
Invalid names: Taphrorthis obesa Xu and Liu 1984 [synonym]
Taphrorthis immatura Williams and Curry 1985
Taphrorthis peculiaris Cooper 1956
G. †Trondorthis Neuman 1974
+
Trondorthis bifurcatus Cooper 1956
Trondorthis sibirica Rozman and Severgina 1983
Trondorthis strandi Neuman and Bruton 1974
Invalid names: Ocorthis [synonym]
Fm. †Orthidiellidae Ulrich and Cooper 1936
+
G. †Orthidiella Ulrich and Cooper 1936
+
Orthidiella longwelli Ulrich and Cooper 1936
G. †Orthidium Hall and Clarke 1892
+
Orthidium lamellosa Raymond 1905
Orthidium lamellosum Raymond 1905
Orthidium prominens Benedetto et al. 2003
G. †Portranella Wright 1964
+
Portranella exornata Sharpe 1853
+
Trematorthis karasaiensis Nikitina et al. 2006
G. †Tuvinia Andreeva 1982
+
Tuvinia alakulica Nikitina et al. 2006
Tuvinia fasciculata Nikitina et al. 2006
Tuvinia radiata Andreeva 1982
Fm. †Plaesiomyidae Schuchert 1913
+
G. †Bokotorthis Popov et al. 2000
+
Bokotorthis abayi Klenina 1984
+
Invalid names: Bokotorthis distincta Klenina 1984 [synonym], Bokotorthis nikitini Klenina 1984 [synonym], Bokotorthis tschingisensis Klenina 1984 [synonym]
Bokotorthis kasachstanica Popov et al. 2000
Bokotorthis kasakhstanica Rukavishnikova 1956
Bokotorthis minuta Popov and Cocks 2014
Subfm. †Evenkininae Williams 1965
+
G. †Evenkina
Subfm. †Metorthinae Williams 1965
+
G. †Metorthis
Subfm. †Plaesiomyinae Schuchert 1913
+
G. †Austinella Foerste 1909
+
Austinella multicostella Alberstadt 1973
Austinella sarybulakensis Popov et al. 2002
G. †Campylorthis Ulrich and Copper 1942
+
Campylorthis deflecta Conrad 1843
Campylorthis discreta Reed 1952
G. †Dinorthis Hall and Clarke 1892
+
Subg. †Dinorthis (Pionorthis) Schuchert and Cooper 1932
Subg. †Dinorthis (Retrorsirostra) Schuchert and Cooper 1932
Dinorthis anticostiensis Shaler 1865
+
Invalid names: Orthis porcata Shaler 1865 [replaced]
Dinorthis berwynensis Whittington 1938
Dinorthis carleyi Hall 1860
Dinorthis flabellulum Sowerby and Murchison 1839
Dinorthis hadra Percival 1991
Dinorthis holdeni Willard 1928
Dinorthis holdenoides Laurie 1991
Dinorthis interstriata Willard 1928
Dinorthis meedsi Winchell and Schuchert 1892
Dinorthis occidentalis Okulitch 1943
Dinorthis pectinella Emmons 1842
Dinorthis taukensis Nikitin et al. 2003
Dinorthis transversa Willard 1928
+
Invalid names: Dinorthis quadriplicata Willard 1928 [synonym]
G. †Madiorthis Zuykov and Harper 2008
+
Madiorthis alsami Zuykov and Harper 2008
+
Multicostella platys Billings 1859
Multicostella plena Cooper 1956
G. †Plaesiomys Hall and Clarke 1892
+
Subg. †Plaesiomys (Plaesiomys) Hall and Clarke 1892
Subg. †Plaesiomys (Valcourea) Raymond 1911
+
Plaesiomys carletona Twenhofel 1928
Plaesiomys fidelis Popov et al. 2000
Plaesiomys idahoensis Ross 1959
Plaesiomys iphigenia Billings 1865
Plaesiomys multiplicata Bancroft 1945
Plaesiomys porcata M'Coy 1846
Plaesiomys porcata lata Mitchell 1977
Plaesiomys proavitus Winchell and Schuchert 1892
+
Invalid names: Plaesiomys planus Wang 1949 [synonym]
Plaesiomys rockymontana Wilson 1926
Plaesiomys saxbiana Oraspold 1959
Invalid names: Pionorthis Schuchert and Cooper 1932 [replaced]
G. †Retrorsirostra Schuchert and Cooper 1932
+
G. †Valcourea Raymond 1911
+
Valcourea confinis Salter 1849
Valcourea semicarinata Cooper 1956
Valcourea strophomenoides Raymond 1905
Fm. †Poramborthidae Havlicek 1950
+
Fm. †Productorthidae Schuchert and Cooper 1931
+
Subfm. †Glossorthinae Williams et al. 2000
+
G. †Glossorthis Öpik 1930
+
Glossorthis schmidti Wysogonski 1900
Glossorthis tacens Opik 1930
G. †Prantlina Havlíček 1949
+
Prantlina desiderata Barrande 1948
Prantlina nasuta Rubel 1961
Subfm. †Productorthinae Schuchert and Cooper 1931
+
G. †Ferrax
G. †Nicolella Reed 1917
+
Nicolella actoniae de Sowerby and Murchison 1839
Nicolella alliku Oraspold 1956
Nicolella crabbi Cocks 2014
Nicolella oswaldi Buch 1849
+
Nicolella oswaldi mediofida Alichova 1951
Nicolella patens Oraspold 1956
Nicolella pterygoidea Pander 1830
Nicolella sylvatica Reed 1936
G. †Panderina Schuchert and Cooper 1931
+
Panderina abscissa Pander 1830
Panderina ambigua Benedetto 2003
Panderina bocki Lamansky 1905
Panderina lata Pander 1830
Panderina pakriensis Rubel 1961
Panderina tetragona Pander 1830
G. †Productorthis Kozlowski 1927
+
Productorthis aculeata Pander 1830
Productorthis angulensis Benedetto 2003
Productorthis eminens Pander 1830
Productorthis mainensis Neuman 1964
Productorthis obtusus Pander 1830
Productorthis parallela Pander 1830
Fm. †Whittardiidae Williams 1974
+
Invalid names: Bajanorthis [nomen dubium], Malinella Andreeva 1982 [nomen dubium], Nugnecella [nomen dubium], Orthacea Woodward and Schuchert 1852 [replaced], Ottadalenites [nomen dubium], Skenidioidae Kozlowski 1929 [empty], Tarfayidae Popov et al. 2009 [empty], Turarella [nomen dubium], Zhejiangorthis [nomen dubium]
Superfm. †Plectorthoidea Schuchert and Le Vene 1929
+
Fm. †Chilcorthidae Benedetto 2015
+
G. †Chilcorthis Benedetto 2015
+
Chilcorthis huarpe Benedetto 2015
Chilcorthis mucronata Williams and Curry 1985
Fm. †Cremnorthidae Williams 1963
+
G. †Brandysia
G. †Cremnorthis Williams 1963
+
Cremnorthis parva Williams 1963
Invalid names: Cremnorthinae Williams 1963 [empty]
Fm. †Cyclocoeliidae Schuchert and Cooper 1931
+
Fm. †Eoorthidae Walcott 1908
+
G. †Apheoorthina Havlíček 1949
+
Apheoorthina daunus Walcott 1905
Apheoorthina ferrigena Havlíček 1949
G. †Apheoorthis Ulrich and Cooper 1936
+
Apheoorthis lineocostis Walcott 1924
Apheoorthis suecica Tjernvik 1956
G. †Austrohedra Roberts and Jell 1990
+
Austrohedra mimica Roberts and Jell 1990
G. †Brahimorthis Havlícek 1971
+
Brahimorthis antiqua Havlícek 1971
Brahimorthis pompeckiana Havlícek 1977
G. †Eoorthis Walcott 1908
+
Eoorthis remnicha Winchell 1886
G. †Glaphyrorthis Roberts and Jell 1990
+
Glaphyrorthis fastigiata Roberts and Jell 1990
G. †Jivinella
+
Invalid names: Jevinellina [synonym]
G. †Otusia
Fm. †Euorthisinidae Havlicek 1977
+
+
Euorthisina nazarenensis Benedetto 2007
Euorthisina orthiformis Havlicek and Branisa 1980
G. †Lesserorthis Benedetto 2007
+
Lesserorthis havliceki Benedetto 2007
G. †Notorthisina Havlicek and Branisa 1980
+
Notorthisina musculosa Villas et al. 2009
Notorthisina notoconcha Havlicek and Branisa 1980
G. †Protorthisina Benedetto 2007
+
Protorthisina simplex Benedetto 2007
Fm. †Finkelnburgiidae Schuchert and Cooper 1931
+
G. †Finkelnburgia Walcott 1905
+
Finkelnburgia macleodi Whitfield 1889
Finkelnburgia missouriensis Ulrich and Cooper 1936
Invalid names: Marcharella [synonym]
G. †Guoleella Zhan et al. 2010
+
Guoleella lata Zhan et al. 2010
+
Notoscaphidia relevata Williams and Curry 1985
G. †Orusia Walcott 1905
+
Orusia lenticularis Wahlenberg 1821
Fm. †Giraldiellidae Williams et al. 2000
+
+
Comatopoma sororia Marek and Havlíček 1967
+
Famatinorthis turneri Levy and Nullo 1973
+
Gelidorthis carlsi Villas 1992
Gelidorthis meloui Villas 1985
Gelidorthis perisiberiaensis Rasmussen et al. 2012
G. †Giraldiella Williams 1951
+
Giraldiella giraldi Williams 1951
Giraldiella protensa de Sowerby 1839
+
Invalid names: Giraldiella lata de Sowerby 1839 [synonym]
Giraldiella subsilurica Marek and Havlíček 1967
G. †Kvania Havlicek 1994
+
Kvania azulpampensis Benedetto 2007
Kvania lariensis Benedetto 2007
Kvania mergli Benedetto 2007
Kvania primigenia Benedetto 2007
G. †Phaceloorthis Percival 1991
+
Phaceloorthis decoris Percival 1991
Phaceloorthis fasciculata Percival 1991
Phaceloorthis recondita Popov et al. 2000
Invalid names: Boonderella Percival 1991 [synonym]
G. †Scaphorthis Cooper 1956
+
Scaphorthis aulacis Percival 1979
Scaphorthis perplexa Cooper 1956
Scaphorthis sulcata Wright 1964
Scaphorthis virginiensis Cooper 1956
Fm. †Nanorthidae Havlicek 1977
+
G. †Gondwanorthis Benedetto and Muñoz 2017
+
Gondwanorthis bastamensis Ghobadi Pour et al. 2011
Gondwanorthis calderensis Benedetto 2007
G. †Lampazarorthis Benedetto and Muñoz 2017
+
Lampazarorthis bifurcata Harrington 1937
Lampazarorthis brachymyaria Benedetto and Carrasco 2002
G. †Shoshonorthis Jaanusson and Bassett 1993
+
Shoshonorthis ovata Pander 1830
Shoshonorthis swanensis Ulrich and Cooper 1938
Shoshonorthis tifletensis Havlicek 1971
Fm. †Phragmorthidae Williams 1965
+
G. †Phragmorthis Cooper 1956
+
Phragmorthis antiqua Ross, Jr. 1972
Phragmorthis buttsi Cooper 1956
Phragmorthis eximia Popov and Cocks 2014
Phragmorthis noda Hansen and Holmer 2011
Fm. †Platystrophiidae Schuchert 1929
+
G. †Acanthorthis Neuman 1976
+
G. †Ffynnonia Neuman and Bates 1978
+
Ffynnonia famatinensis Benedetto 2003
G. †Gnamptorhynchos Jin 1989
+
Gnamptorhynchos globatum Twenhofel 1928
+
Invalid names: Gnamptorhynchos inversum Jin 1989 [synonym]
Gnamptorhynchos manitobensis Jin and Zhan 2000
Gnamptorhynchos orbiculoidea Jin and Chatterton 1997
Gnamptorhynchos prayi Howe 1966
G. †Mcewanella Foerste 1920
+
Mcewanella dorsisulcata Wright 1964
Mcewanella vulcanica Villas et al. 1989
G. †Neoplatystrophia Zuykov and Harper 2007
+
Neoplatystrophia deani Cocks 2014
Neoplatystrophia humilis Oraspold 1959
Neoplatystrophia janniensis Zuykov and Harper 2007
Neoplatystrophia lutkevichi Alikhova 1951
Neoplatystrophia saxbyensis Oraspold 1959
G. †Platystrophia King 1850
+
Platystrophia amoena McEwan 1919
Platystrophia annieana Foerste 1910
Platystrophia anomala Hiller 1980
Platystrophia baltica Zuykov and Harper 2007
Platystrophia biforatus Schlotheim 1820
Platystrophia caelata Williams 1974
Platystrophia chama Eichwald 1861
Platystrophia colbiensis Foerste 1910
Platystrophia costata Pander 1830
Platystrophia costatus Pander 1830
Platystrophia crassoplicata Alichova 1951
Platystrophia cypha James 1874
Platystrophia elegantula McEwan 1919
Platystrophia extensa McEwan 1920
Platystrophia hongueda Li and Copper 2006
Platystrophia hopensis Foerste 1910
Platystrophia humilis Oraspold 1959
Platystrophia lutkevichi Alikhova 1951
Platystrophia lynx Eichwald 1830
Platystrophia lynx lynx Alikhova 1953
Platystrophia orbiculata Oraspold 1959
Platystrophia pogrebovi Zuykov and Harper 2007
Platystrophia ponderosa Foerste 1909
Platystrophia quadriplicata Alikhova 1951
Platystrophia saxbyensis Oraspold 1959
Platystrophia scotica Williams 1962
Platystrophia tramorensis Liljeroth et al. 2017
G. †Salacorthis Williams 1974
+
Salacorthis costellata Williams 1979
G. †Siljanostrophia Zuykov and Egerquist 2005
+
Siljanostrophia camerata Twenhofel 1928
Siljanostrophia jaanussoni Zuykov and Egerquist 2005
G. †Vinlandostrophia Zuykov and Harper 2007
+
Vinlandostrophia cypha James 1874
Fm. †Plectorthidae Schuchert and Le Vene 1929
+
G. †Ashinaorthis Popov and Cocks 2014
+
Ashinaorthis recta Klenina 1984
G. †Atlantida
+
Desmorthis bifurcata Benedetto 2003
Desmorthis segnis Havlicek and Branisa 1980
G. †Doleroides Cooper 1930
+
Doleroides germanus Steele and Sinclair 1971
Doleroides gibbosa Billings 1857
Doleroides mixticius Percival 1991
Doleroides panna Andreeva 1955
Doleroides ponderosus Cooper 1956
Doleroides tennesseensis Cooper 1956
Doleroides winchelli Cooper 1956
G. †Hebertella Hall and Clarke 1892
+
Subg. †Hebertella (Schizonema) Foerste 1909
Hebertella dinorthoides Laurie 1991
Hebertella estonica Rõõmusoks 1964
Hebertella maria Billings 1862
+
Invalid names: Hebertella latasulcata Foerste 1914 [synonym], Orthis subjugata Hall 1847 [synonym]
Hebertella parksensis Foerste 1909
Hebertella sinuata Hall 1847
G. †Irhirea
G. †Lipanorthis Benedetto and Carrasco 2002
+
Lipanorthis andinus Benedetto and Carrasco 2002
Lipanorthis santalaurae Benedetto and Carrasco 2002
G. †Mimella Cooper 1930
+
Mimella borealis Billings 1859
Mimella globosa Willard 1928
+
Invalid names: Mimella superba Butts 1942 [synonym]
Mimella globularis Cooper 1956
Mimella imperator Billings 1859
Mimella nucleoidea Cooper 1956
Mimella vulgaris Raymond 1911
Mimella zhejiangensis Liang 1983
Invalid names: Sonculina [synonym]
G. †Nanorthis Ulrich and Cooper 1936
+
Nanorthis carinata Laurie 1980
Nanorthis hamburgensis Walcott 1884
Nanorthis purmamarcaensis Benedetto and Carrasco 2002
Nanorthis putilla Walcott 1924
Invalid names: Evenkinorthis [synonym]
Subfm. †Orthostrophiinae Schuchert and Cooper 1931
+
G. †Giraldibella Havlícek 1977
+
Giraldibella bella Bergström 1968
Giraldibella hyskovensis Havlícek 1977
Subfm. †Plectorthinae Schuchert and Le Vene 1929
+
G. †Kujanorthis Nikitina et al. 2006
+
Kujanorthis anderkensis Nikitina et al. 2006
G. †Plectorthis Hall and Clarke 1892
+
Plectorthis australis Cooper 1956
Plectorthis burultasica Popov et al. 2002
Plectorthis cliefdenensis Percival 1991
Plectorthis exfoliata Raymond 1905
Plectorthis licta Popov and Cocks 2006
Plectorthis mazourkaensis Phleger, Jr. 1933
Plectorthis patulus Phleger, Jr. 1933
Plectorthis punctata Cooper 1956
Plectorthis scotica McCoy 1852
G. †Schizophorella Reed 1917
+
Schizophorella fallax Salter 1846
+
Invalid names: Platystrophiinae Schuchert 1929 [empty], Platystrophinae Schuchert and Le Vene 1929 [empty]
Fm. †Ranorthidae Havlicek 1949
+
G. †Ranorthis Öpik 1939
+
Ranorthis carinata Rubel 1961
Ranorthis norvegica Öpik 1939
Ranorthis parvula Lamansky 1905
Ranorthis trivia Rubel 1961
Fm. †Rhactorthidae Williams 1963
+
G. †Aberia
+
Eripnifera praecipitis Potter 1990
G. †Rhactorthis Williams 1963
+
Rhactorthis crassa Williams 1963
Fm. †Tasmanorthidae Laurie 1991
+
Fm. †Wangyuiidae Zhang 1989
+
Subfm. †Alpeisinae Popov and Cocks 2014
+
G. †Alpeis Popov and Cocks 2014
+
Alpeis tolenensis Borissiak 1972
G. †Bowanorthis Percival 1991
+
Bowanorthis devexa Popov et al. 2002
Bowanorthis fragilis Percival 1991
G. †Sigmelasma Potter 1990
+
Sigmelasma pantherae Potter 1990
Sigmelasma peepi Hints 2012
G. †Toxorthis
+
Toxorthis proteus Temple 1968
G. †Wangyuia Zhang 1989
+
Subfm. †Wangyuiinae Zhang 1989
+
G. †Enbektenorthis Popov and Cocks 2014
+
Enbektenorthis molesta Popov and Cocks 2014
Invalid names: Apatoskenidioides [nomen dubium], Lebediorthis [nomen dubium]
Superfm. †Triplesiacea Schuchert 1913
+
Fm. †Oxopleciidae Havlicek and Storch 1990
+
G. †Placocliftonia Havlicek and Storch 1990
+
Placocliftonia colibri Barrande 1848
Invalid names: Triplesidae Schuchert 1913 [empty]
Invalid names: Enteletacea Waagen 1884 [empty], Protorthacea Cooper 1976 [empty]
G. †Sphenorthis Grubbs 1939
Invalid names: Orthina Schuchert and Cooper 1932 [empty], Rhipidomellida Schuchert 1913 [replaced]