Classification of Marsh 1869
G. †Halisaurus Marsh 1869
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†Halisaurus fraternus Marsh 1869
†Halisaurus platyspondylus Marsh 1869
G. †Mosasaurus Parkinson 1822
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†Mosasaurus copeanus Marsh 1869
†Mosasaurus meirsii Marsh 1869
†Mosasaurus princeps Marsh 1869