Classification of the genus Megalonyx

G. †Megalonyx Harlan 1825
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Megalonyx curvidens Matthew 1924
Megalonyx cuvieri Lund 1839
Megalonyx gigas Marsh 1874
Megalonyx jeffersonii Desmarest 1822 [Jefferson's ground sloth]
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Invalid names: Ereptodon priscus Leidy 1853 [synonym], Megalonyx brachycephalus Sellards 1941 [synonym], Megalonyx californicus Stock 1913 [synonym], Megalonyx dissimilis Leidy 1855 [synonym], Megalonyx hogani Stovall 1940 [synonym], Megalonyx laqueatus Harlan 1831 [synonym], Megalonyx milleri Lyon 1938 [synonym], Megalonyx sierrensis Sinclair 1905 [synonym]
Megalonyx leidyi Lindahl 1892
Megalonyx leptostomus Cope 1893
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Invalid names: Megalonyx rohrmani Gustafson 1978 [synonym]
Megalonyx mathisi Hirschfeld and Webb 1968
Megalonyx obtusidens Webb and Perrigo 1985
Megalonyx validus Leidy 1868
Megalonyx wheatleyi Cope 1871
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Invalid names: Megalonyx loxodon Cope 1871 [synonym], Megalonyx scalper Cope 1899 [synonym], Megalonyx sphenodon Cope 1871 [synonym], Megalonyx tortulus Cope 1871 [synonym]
Invalid names: Megalonyx gracilis Lund 1893 [nomen nudum], Morotherium Marsh 1874 [synonym]