I got a great question from @ausar_the, so I'll add that one of the new complexities is that grit likely had a larger role in horse tooth evolution that grass consumption. See Semprebon et al. 2019 for a recent reference: https://t.co/XuYvwxcyNC
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@ausar_the Great question! Yes, grit plays a major role in horse evolution (one of the newer developments alluded to in the last tweet of the thread). Growing evidence (consensus?) is that grit likely played a larger immediate role in hypsodonty evolution.
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The Role of Grass vs. Exogenous Abrasives in the Paleodietary Patterns of North American Ungulates https://t.co/h6rnrk2tgy
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The Role of Grass vs. Exogenous Abrasives in the Paleodietary Patterns of North American Ungulates https://t.co/Yklha47gUV