Classification of the species Gomphotherium productum

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Invalid names: Gomphotherium pojoaquense Frick 1926 [synonym], Mastodon serridens Cope 1884 [synonym], Megabelodon minor Mawby 1968 [synonym], Ocalientinus ojocaliensis Frick 1933 [synonym], Tetrabelodon lulli Barbour 1914 [synonym], Trilophodon cruziensis Frick 1933 [synonym], Trilophodon joraki Frick 1933 [synonym], Trilophodon phippsi Cook 1928 [synonym]