Classification of Mcintosh and Berman 1975
G. †Apatosaurus Marsh 1877
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†Apatosaurus ajax Marsh 1877
†Apatosaurus louisae Holland 1915
Invalid names: Brontosaurus Marsh 1879 [synonym]
G. †Atlantosaurus Marsh 1877
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†Atlantosaurus immanis Marsh 1878
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Invalid names: Apatosaurus laticollis Marsh 1879 [objective synonym]
†Atlantosaurus montanus Marsh 1877