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. 2019 Oct 2;14(10):e0222680. doi: 10.1371/journal.pone.0222680

Fig 9. Pit depth and quandong nut diameter.

Fig 9

The distribution of nut diameter is normally distributed, as expected; while that of quandong stone pit depth varies more widely. This might be the result of the sample having younger and more developed pits, as well as differentiation by function, with an excess of deeper pits for nut cracking.