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Unicuspid teeth of durophagous non-mammals. (a) Caiman lizard (genus Dracaena), (b) wolf eel (Anarrhichthys ocellatus) and (c) sheepshead fish (Archosargus probatocephalus). Note dome-like (bunodont) structure of the cheek teeth, suited to a hard-food diet. Images in (a,b) courtesy of Dr Karen Petersen, University of Washington. (Online version in colour.)
