Classification of Lindgren and Siverson 2002

Or. Squamata Oppel 1811 [squamates]
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Fm. †Mosasauridae Gervais 1852 [mosasaur]
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Subfm. †Tylosaurinae Wiliston 1895
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G. †Tylosaurus Marsh 1872
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†Tylosaurus ivoensis Russell 1967
†Tylosaurus proriger Cope 1869