Classification of Schwimmer et al. 1997
Or. †Ichthyodectiformes Bardack and Sprinkle 1969
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Fm. †Ichthyodectidae Crook 1892
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G. †Xiphactinus Leidy 1870
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†Xiphactinus audax Leidy 1870
†Xiphactinus vetus Leidy 1856
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Invalid names: Polygonodon rectus Leidy 1858 [synonym], Portheus angulatus Cope 1872 [synonym]
Invalid names: Polygonodon Leidy 1856 [synonym]