Classification of Brunton and Champion 1974
Cl. †Inarticulata Huxley 1869
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Cl. †Articulata Huxley 1869
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Or. Rhynchonellida Kuhn 1949
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Invalid names: Stenoscismatacea Oelert 1887 [empty]
Or. †Spiriferida Waagen 1883
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Invalid names: Athyridacea M'Coy 1884 [empty], Cyrtiacea Frederiks 1919 [empty], Suessiacea Waagen 1883 [empty]
Or. †Strophomenida Opik 1934
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Invalid names: Davidsoniacea King 1850 [empty]