Classification of Rubel 1961
Superfm. †Orthacea Woodward and Schuchert 1852
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Fm. †Orthidae Woodward 1852
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G. †Nicolella Reed 1917
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†Nicolella actoniae de Sowerby and Murchison 1839
†Nicolella pterygoidea Pander 1830
Subfm. †Orthinae Woodward 1852
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G. †Cyrtonotella Schuchert and Cooper 1931
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†Cyrtonotella pakriensis Rubel 1961
†Cyrtonotella semicircularis Eichwald 1829
G. †Orthambonites Pander 1830
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†Orthambonites calligramma Dalman 1828
†Orthambonites inaequalis Rubel 1961
†Orthambonites majuscula Rubel 1961
†Orthambonites orbicularis Pander 1830
G. †Orthis Dalman 1828
Subfm. †Productorthinae Schuchert and Cooper 1931
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G. †Panderina Schuchert and Cooper 1931
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†Panderina abscissa Pander 1830
†Panderina bocki Lamansky 1905
†Panderina lata Pander 1830
†Panderina pakriensis Rubel 1961
†Panderina tetragona Pander 1830
G. †Productorthis Kozlowski 1927
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†Productorthis aculeata Pander 1830
†Productorthis eminens Pander 1830
†Productorthis obtusus Pander 1830
†Productorthis parallela Pander 1830
Fm. †Plectorthidae Schuchert and Le Vene 1929
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Invalid names: Platystrophiinae Schuchert 1929 [empty]
Fm. †Ranorthidae Havlicek 1949
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G. †Ranorthis Öpik 1939
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†Ranorthis carinata Rubel 1961
†Ranorthis parvula Lamansky 1905
†Ranorthis trivia Rubel 1961
Fm. †Lycophoriidae Schuchert and Cooper 1931
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G. †Lycophoria Lahusen 1885
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†Lycophoria globosa Eichwald 1829
†Lycophoria lamanskii Rubel 1961
†Lycophoria longissima Pander 1830
†Lycophoria nucella Dalman 1828
Superfm. †Dalmanellacea Schuchert and Cooper 1931
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Fm. †Paurorthidae Opik 1933
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G. †Paurorthis Schuchert and Cooper 1931
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†Paurorthis minima Pander 1830
†Paurorthis parva Pander 1830
†Paurorthis valida Rubel 1961
Superfm. †Syntrophiacea Schuchert and Cooper 1931
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Fm. †Camerellidae Hall and Clarke 1894
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Invalid names: Syntrophopsidae Ulrich and Cooper 1936 [empty]