Classification of Cook 1997

G. †Anomphalus Meek and Worthen 1866
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†Anomphalus pajelli Cook 1997
G. †Euryzone Koken 1896
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G. †Palaeozygopleura Horný 1955
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Superfm. †Oriostomatoidea Wenz 1938
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Fm. †Oriostomatidae Koken 1896
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G. †Didymalgia Cook 1997
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Subfm. †Ophiletinae Knight 1956
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G. †Burdekinostoma Cook 1997
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G. †Trinema Cook 1997
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†Trinema heideckeri Cook 1997
Subg. †Murchisonia (Murchisonia) d'Archiac and de Verneuil 1841
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