Classification of Tobien 1973

†Mastodon brevidens Cope 1889
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†Mastodon euhyphodon Cope 1884
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†Mastodon ligoniferus Cope and Matthew 1915
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†Mastodon obscurum Leidy 1869
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†Rhynchotherium rectidens Osborn 1923
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†Mastodon shepardii Leidy 1870
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G. †Gomphotherium Burmeister 1837
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†Gomphotherium blicki Frick 1933
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Invalid names: Aybelodon hondurensis Frick 1933 [synonym], Rhynchotherium tlascalae Falconer 1868 [synonym]
†Gomphotherium buckneri Sellards 1940
†Gomphotherium morrilli Barbour 1914
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Invalid names: Gomphotherium calvertensis Gazin and Collins 1950 [synonym], Gomphotherium cimarronis Hay 1925 [synonym], Gomphotherium cingulatum Downs 1951 [synonym], Megabelodon minor Mawby 1968 [synonym], Ocalientinus ojocaliensis Frick 1933 [synonym], Serridentinus fricki Peterson 1928 [synonym], Serridentinus progressus Osborn 1923 [synonym], Tetrabelodon lulli Barbour 1914 [synonym], Tetrabelodon osborni Barbour 1916 [synonym], Tetrabelodon willistoni Barbour 1914 [synonym], Trilophodon abeli Barbour 1925 [synonym], Trilophodon cruziensis Frick 1933 [synonym], Trilophodon giganteus Osborn 1921 [synonym], Trilophodon gregorii Frick 1933 [synonym], Trilophodon joraki Frick 1933 [synonym], Trilophodon phippsi Cook 1928 [synonym], Trilophodon pojoaquensis Frick 1926 [synonym], Trilophodon riograndensis Frick 1933 [synonym], Trilophodon simplicidens Osborn 1923 [synonym], Trilophodon simpsoni Stirton 1939 [synonym], Trobelodon taoensis Frick 1933 [synonym]
†Gomphotherium thorpei Barbour and Sternberg 1935
Invalid names: Eubelodon Barbour 1914 [synonym], Genomastodon Barbour 1917 [synonym], Gnathabelodon Barbour and Sternberg 1935 [synonym], Megabelodon Barbour 1914 [synonym], Ocalientinus Frick 1933 [synonym], Tetrabelodon Cope 1884 [synonym], Trilophodon Falconer 1857 [synonym], Trobelodon Frick 1933 [synonym]