Classification of Chitnarin et al. 2008
G. Bairdia M'Coy 1844
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†Bairdia altiarcus Chen 1958
†Bairdia piscariformis Chen 1958
†Bairdia takfaensis Chitnarin et al. 2008
Superfm. †Kloedenelloidea Ulrich and Bassler 1908
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Invalid names: Beyrichopsidae Henningmoen 1953 [empty]
Subor. †Kloedenellocopina Scott 1961
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Fm. Bairdiidae Sars 1888
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Fm. †Kirkbyidae Ulrich and Bassler 1906
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