Fig. 1.

The morphological innovation of Zanclus cornutus and its ability to rotate its jaws laterally. (A) shows an individual Z. cornutus photographed in the wild (credit: Victor Huertas), and (B) shows ventral and dorsal views from CT scans of Z. cornutus, with the different bones color-coded. (C) Frames from a bite sequence recorded of Z. cornutus feeding on a benthic resource. Time zero (t = 0) represents the time at which the jaws contact the substratum. (D) shows the maximum range of jaw rotation from our videos.