Classification of Siveter 1977
Fm. †Calymenidae Milne-Edwards 1840
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Subfm. †Flexicalymeninae Siveter 1977
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G. †Flexicalymene Shirley 1936
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Subg. †Flexicalymene (Flexicalymene) Siveter 1977
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†Flexicalymene (Flexicalymene) caractaci Salter 1865
G. †Metacalymene Kegel 1927
G. †Platycalymene Shirley 1936
G. †Thelecalymene Whittington 1971
Subfm. †Pharostomatinae Hupe 1953
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G. †Pharostoma Hawle and Corda 1847
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†Pharostoma narinosum Siveter 1977
†Pharostoma pulchra Beyrich 1846
Invalid names: Prionocheilus Rouault 1847 [nomen oblitum]
Subg. †Flexicalymene (Onnicalymene) Dean 1962
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†Flexicalymene (Onnicalymene) jemtlandica Thorslund 1940
†Flexicalymene (Onnicalymene) onniensis Shirley 1936
†Flexicalymene (Onnicalymene) scabustula Siveter 1977
Subg. †Flexicalymene (Reacalymene) Shirley 1936
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†Flexicalymene (Reacalymene) limba Shirley 1936
†Flexicalymene caractaci Salter 1865
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Invalid names: Flexicalymene cobboldi Dean 1963 [synonym]