Classification of Malinky 1990
Or. †Orthothecida Marek 1966
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Fm. †Novitatidae Sysoyev 1968
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G. †Decoritheca Syssoiev 1968
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†Decoritheca canalis Resser and Endo 1937
†Decoritheca cyrene Walcott 1905
†Decoritheca glabrus Walcott 1911
Fm. †Orthothecidae Syssoiev 1957
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G. †Hyolithes d'Eichwald 1840
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†Hyolithes aliger Resser and Endo 1937
†Hyolithes delia Walcott 1905
†Hyolithes endoi Howell 1946
†Hyolithes fuchouensis Resser and Endo 1937
†Hyolithes kuantungensis Resser and Endo 1937
†Hyolithes mantouensis Resser and Endo 1937
†Hyolithes sondai Resser and Endo 1937
Ph. Mollusca Linnaeus 1758 [mollusk]
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Cl. †Hyolitha Marek 1963
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G. †Circotheca Syssoiev 1958
Or. †Hyolithida Mathew 1962
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Fm. †Crestjahitidae Syssoiev 1968
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G. †Crestjahitus Syssoiev 1968
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†Crestjahitus compressus Syssoiev 1968
†Crestjahitus delphus Resser and Endo 1937
†Crestjahitus distortus Syssoiev 1962
†Crestjahitus figuratus Rozanov et al. 1969
Fm. †Hyolithidae Nicholson 1889
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G. †Hallotheca Malinky et al. 1987
G. †Nevadotheca Malinky 1988
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†Nevadotheca cybele Walcott 1905
†Nevadotheca excellens Billings 1872
†Nevadotheca heckeli Malinky 1988
†Nevadotheca princeps Billings 1872
†Nevadotheca whitei Resser 1938
G. †Linevitus Syssoiev 1958
G. †Semielliptotheca Syssoiev 1958