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. 2017 Aug 30;13(8):20170348. doi: 10.1098/rsbl.2017.0348

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© 2017 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 1. — Tooth sharpness in marine mammals varies among species. Comparison of the postcanine teeth of (a) an extant terrestrial carnivoran, the dingo Canis lupus (NMV C25871, mirrored), with that of (b) an extant seal known to employ tooth-based suction filter feeding (crabeater seal, Lobodon carcinophaga, NMV C7392), and (c) the extinct toothed mysticete †Janjucetus (NMV P252376; see electronic supplementary material for diagnosis). Note the sharp cutting edges in the dingo and †Janjucetus. Three-dimensional surface models not to scale. Life reconstructions by Carl Buell.