Classification of Albright et al. 2007

Fm. †Polycotylidae Williston 1908
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Subfm. †Palmulainae Albright et al. 2007
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G. †Palmula Albright et al. 2007
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Palmula quadratus Albright et al. 2007
Subfm. †Polycotylinae Albright et al. 2007
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G. †Dolichorhynchops Williston 1902
G. †Eopolycotylus Albright et al. 2007
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Eopolycotylus rankini Albright et al. 2007
G. †Polycotylus Cope 1869
G. †Trinacromerum Cragin 1888
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Invalid names: Polycotyilnae Albright et al. 2007 [empty]