Classification of Cooper 1973

Fm. Cancellothyrididae Thomson 1926
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Subfm. Cancellothyridinae Thomson 1926
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G. †Rhynchonellopsis Bose 1894
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†Symphythyris neocomiensis d'Orbigny 1847
G. Terebratulina d'Orbigny 1847
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†Terebratulina silicea Quenstedt 1856
Subfm. †Cricosiinae Cooper 1973
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G. †Cricosia Cooper 1973
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†Cricosia filosa Conrad 1866
G. †Cruralina Smirnova 1966
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†Cruralina guadalupae Roemer 1852
G. †Gyrosoria Cooper 1973
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†Gyrosoria gracilis Schlotheim 1813
Fm. Chlidonophoridae Muir-Wood 1959
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Subfm. Agulhasiinae Muir-Wood 1965
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Subfm. Chlidonophorinae Muir-Wood 1959
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G. Chlidonophora Dall 1903
G. †Disculina
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†Disculina hemisphaerica Sowerby 1829
G. †Gisilina Steinich 1963
G. †Meonia
G. †Rugia Steinich 1963
Subfm. Eucalathinae Muir-Wood 1965
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G. Eucalathis Fischer and Oehlert 1890
Subfm. †Orthothyridinae Muir-Wood 1965
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G. †Orthothyris Cooper 1955
Fm. Cnismatocentridae Cooper 1973
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G. Cnismatocentrum Dall 1920