Classification of Forster and Spamer 1986
G. †Apatosaurus Marsh 1877
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†Apatosaurus excelsus Marsh 1879
Invalid names: Brontosaurus Marsh 1879 [synonym]
G. †Megalonyx Harlan 1825
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†Megalonyx jeffersonii Desmarest 1822 [Jefferson's ground sloth]