Classification of Macomber 1970

Or. †Orthida Schuchert and Cooper 1932
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Fm. †Dalmanellidae Schuchert 1913
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G. †Diceromyonia Wang 1949
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†Diceromyonia storeya Okulitch 1943
Fm. †Dolerorthidae Opik 1934
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G. †Hesperorthis Schuchert and Cooper 1931
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†Hesperorthis pyramidalis Twenhofel 1928
Fm. †Plaesiomyidae Schuchert 1913
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G. †Dinorthis Hall and Clarke 1892
G. †Plaesiomys Hall and Clarke 1892
Fm. †Plectorthidae Schuchert and Le Vene 1929
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G. †Platystrophia King 1850
Or. †Strophomenida Opik 1934
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Fm. †Sowerbyellidae Opik 1930
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G. †Thaerodonta Wang 1949
Fm. †Strophomenidae King 1846
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G. †Megamyonia Wang 1949
G. †Oepikina Salmon 1942
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†Oepikina pergibbosa Foerste 1917
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Invalid names: Oepikina altidorsata Bradley 1921 [synonym], Oepikina limbrata Wang 1949 [synonym]
G. †Strophomena Rafinesque and De Blainville 1824
Or. Rhynchonellida Kuhn 1949
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Fm. †Rhynchotrematidae Schuchert 1913
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G. †Hypsiptycha Wang 1949
G. †Lepidocyclus Wang 1949
G. †Rhynchotrema Hall 1860
Or. †Spiriferida Waagen 1883
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Fm. †Atrypidae Gill 1871
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G. †Zygospira Hall 1862
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†Zygospira aequivalvis Twenhofel 1928
Fm. †Dayiidae Waagen 1883
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G. †Cyclospira Hall and Clarke 1893
Subg. †Plaesiomys (Plaesiomys) Hall and Clarke 1892
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