Classification of Mitchell 1977

Cl. †Inarticulata Huxley 1869
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Or. †Acrotretida Kuhn 1949
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Invalid names: Acrotretidina Kuhn 1949 [empty]
Or. Lingulida Waagen 1885
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Superfm. †Discinacea Gray 1840
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Fm. †Discinidae Gray 1840
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Invalid names: Orbiculoideinae Schuchert 1929 [empty]
Invalid names: Craniidina Waagen 1885 [empty], Lingulacea Menke 1828 [empty], Trimerellacea Davidson and King 1872 [empty]
Or. †Orthida Schuchert and Cooper 1932
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Subor. †Clitambonitidina Opik 1934
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Superfm. †Gonambonitacea Schuchert and Cooper 1931
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Fm. †Kullervoidae Opik 1934
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G. †Kullervo Opik 1932
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†Kullervo panderi Opik 1930
Invalid names: Clitambonitacea Winchell and Schuchert 1893 [empty]
Fm. †Cremnorthidae Williams 1963
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Invalid names: Cremnorthinae Williams 1963 [empty]
Fm. †Dalmanellidae Schuchert 1913
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G. †Dalmanella Hall and Clarke 1892
Fm. †Dicoelosiidae Cloud 1948
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G. †Dicoelosia King 1850
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†Dicoelosia biloba Linnaeus 1758
†Dicoelosia simulata Mitchell 1977
Fm. †Paurorthidae Opik 1933
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G. †Eremotrema Cooper 1956
G. †Paucicrura Cooper 1956
G. †Paurorthis Schuchert and Cooper 1931
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†Paurorthis parva Pander 1830
Fm. †Plaesiomyidae Schuchert 1913
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Subfm. †Plaesiomyinae Schuchert 1913
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G. †Campylorthis Ulrich and Copper 1942
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†Campylorthis deflecta Conrad 1843
G. †Plaesiomys Hall and Clarke 1892
Fm. †Plectorthidae Schuchert and Le Vene 1929
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Subfm. †Plectorthinae Schuchert and Le Vene 1929
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G. †Doleroides Cooper 1930
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†Doleroides gibbosa Billings 1857
G. †Mimella Cooper 1930
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†Mimella globosa Willard 1928
G. †Plectorthis Hall and Clarke 1892
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†Plectorthis scotica McCoy 1852
G. †Scaphorthis Cooper 1956
G. †Schizophorella Reed 1917
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†Schizophorella fallax Salter 1846
Invalid names: Platystrophinae Schuchert and Le Vene 1929 [empty]
Fm. †Skenidiidae Kozlowski 1929
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G. †Skenidioides Schuchert and Cooper 1931
Subor. †Triplesiidina Moore 1952
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Superfm. †Triplesiacea Schuchert 1913
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Fm. †Triplesiidae Schuchert 1913
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G. †Epacroplecia Williams 1962
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†Epacroplecia grayiae Davidson 1870
G. †Onychotreta Ulrich and Cooper 1936
G. †Oxoplecia Wilson 1913
G. †Streptis Davidson 1881
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†Streptis grayii Davidson 1848
G. †Triplesia Hall 1859
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†Triplesia extans Emmons 1842
Fm. †Tyronellidae Mitchell 1977
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G. †Tyronella Mitchell 1977
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†Tyronella killeyensis Mitchell 1977
Invalid names: Enteletacea Waagen 1884 [empty], Orthina Schuchert and Cooper 1932 [empty]
Cl. †Articulata Huxley 1869
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Or. †Strophomenida Opik 1934
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Fm. †Bimuriidae Cooper 1956
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G. †Bimuria Ulrich and Cooper 1942
Fm. †Sowerbyellidae Opik 1930
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Subfm. †Aegiromeninae Havlicek 1961
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G. †Aegiria Opik 1933
G. †Anisopleurella Cooper 1956
G. †Eochonetes Reed 1917
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†Eochonetes celticus Mitchell 1977
G. †Eoplectodonta Kozlowski 1929
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Invalid names: Thaerodonta Wang 1949 [synonym]
Subfm. †Sowerbyellinae Opik 1930
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G. †Sowerbyella Jones 1928
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†Sowerbyella monilifera Cooper 1956
Fm. †Stropheodontidae Caster 1939
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Subfm. †Stropheodontinae Caster 1939
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G. †Brachyprion Shaler 1865
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†Brachyprion portlocki Reed 1952
G. †Eostropheodonta Bancroft 1949
G. †Origostrophia Mitchell 1977
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†Origostrophia fragilis Mitchell 1977
Invalid names: Strophomenacea King 1846 [empty], Strophomenidina Opik 1934 [empty]
G. †Leangella Opik 1933
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†Leangella discuneata Lamont 1935
Invalid names: Diambonia Cooper and Kindle 1936 [synonym]
Or. †Pentamerida Schuchert and Cooper 1931
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Subor. †Syntrophiidina Ulrich and Cooper 1936
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Fm. †Camerellidae Hall and Clarke 1894
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Subfm. †Camerellinae Hall and Clarke 1894
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G. †Camerella Billings 1859
Fm. †Parastrophinidae Ulrich and Cooper 1938
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G. †Liostrophia Cooper and Kindle 1936
G. †Parastrophina Schuchert and LeVene 1929
Or. Rhynchonellida Kuhn 1949
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Superfm. †Rhynchonellacea Gray 1848
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Fm. †Ancistrorhynchidae Cooper 1956
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G. †Drepanorhyncha Cooper 1956
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†Drepanorhyncha ottawaensis Billings 1862
Fm. †Rhynchotrematidae Schuchert 1913
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Subfm. †Rhynchotrematinae Schuchert 1913
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G. †Hypsiptycha Wang 1949
G. †Rhynchotrema Hall 1860
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†Rhynchotrema plicatum Cooper and Kindle 1936
Invalid names: Trigonorhynchiidae McLaren 1965 [empty]
Or. †Spiriferida Waagen 1883
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Subor. †Athyrididina Boucot et al. 1964
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Invalid names: Athyridacea M'Coy 1884 [empty]
Subor. †Atrypidina Moore 1952
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Superfm. †Atrypacea Gill 1871
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Fm. †Atrypidae Gill 1871
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Subfm. †Carinatininae Rzhonsnitskaya 1960
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G. †Plectatrypa Schuchert and Cooper 1930
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†Plectatrypa imbricata Sowerby and Murchison 1839
Invalid names: Plectatrypa Schuchert and Cooper 1930 [synonym], Plectatrypa Schuchert and Cooper 1930 [synonym], Plectatrypa imbricata Sowerby and Murchison 1839 [valid]
Invalid names: Zygospirinae Waagen 1883 [empty]
Invalid names: Daylacea Waagen 1883 [empty]
†Dalmanella testudinaria Dalman 1828
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Subg. †Sowerbyella (Rugosowerbyella) Mitchell 1977
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Subfm. †Orthinae Woodward 1852
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G. †Cyrtonotella Schuchert and Cooper 1931
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†Cyrtonotella semicircularis Eichwald 1829
G. †Diplonorthis Mitchell 1972
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†Diplonorthis portlocki Mitchell 1977
G. †Orthambonites Pander 1830
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G. †Taphrorthis Cooper 1956
Subg. †Sowerbyella (Sowerbyella) Jones 1928
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†Sowerbyella (Sowerbyella) thraivensis Sowerby and Murchison 1839
†Plaesiomys porcata M'Coy 1846
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†Plaesiomys porcata lata Mitchell 1977
Subfm. †Leptestiinae Opik 1933
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G. †Bilobia Cooper 1956
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†Bilobia etheridgei Davidson 1883
G. †Leangella Opik 1933
G. †Leptestiina Opik 1933
G. †Palaeostrophomena Holtedahl 1916
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†Palaeostrophomena concava Holtedahl 1916
G. †Sowerbyites Teichert 1937
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†Sowerbyites hibernicus Mitchell 1977
G. †Titanambonites Cooper 1956
†Christiania perrugata Reed 1945
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