| Concerning this jaw, Cope remarked that it was a trilophodont mastodont with a short downturned symphysis but did not figure it. |
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| This publication puts the Heisler mastodont into detailed contest with the environment in which it lived and died. |
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| This line is based on the lack of mastodont, mammoth, and other Pleistocene vertebrate remains as well as Paleo-Indian artifacts north of the line. |
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| In the paper to follow he riot only reported mastodont remains from 36 Michigan counties but commented on mastodont remains discovered in the state before his time. |
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