Classification of the family Alatoconchidae
Fm. †Alatoconchidae Termier et al. 1973
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Subfm. †Alatoconchinae Termier et al. 1973
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G. †Shikamaia Ozaki 1968
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Subg. †Shikamaia (Alatoconcha) Termier et al. 1973
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†Shikamaia (Alatoconcha) vampyra Termier et al. 1973
Subg. †Shikamaia (Shikamaia) Ozaki 1968
†Shikamaia akasakaensis Ozaki 1968
†Shikamaia ozakii Asato and Kase 2017
†Shikamaia perakensis Runnegar and Gobbett 1975
Invalid names: Tanchintongia Runnegar and Gobbett 1975 [synonym]
Subfm. †Saikraconchinae Yancey and Ozaki 1986
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G. †Saikraconcha Yancey and Boyd 1983
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Subg. †Saikraconcha (Dereconcha) Yancey and Boyd 1983
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†Saikraconcha (Dereconcha) kamparensis Yancey and Boyd 1983
Subg. †Saikraconcha (Saikraconcha) Yancey and Boyd 1983
†Saikraconcha ogulineci Kochansky-Devide 1978
†Saikraconcha tunisiensis Yancey and Boyd 1983