Niall Benvie / American alligator (A. mississippiensis) teeth. C. PY, USA. Pennsylvania
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Sylvain Cordier / Redeye Piranha ( Serrasalmus rhombeus / niger ) out of water, close up of teeth, Rio Negro, Amazonas, Brazil.
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Sylvain Cordier / Red-bellied piranha or red piranha (Pygocentrus nattereri) out of water, close up of teeth, Rio Negro, Amazonas, Brazil.
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Sylvain Cordier / RF - Red-bellied piranha or red piranha (Pygocentrus nattereri) taken out of water - close up showing sharp teeth. Rio Negro, Amazonas, Brazil. (This image may be licensed either as rights managed or...
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Sylvain Cordier / RF - Red-bellied piranha (Pygocentrus nattereri) and Redeye Piranha (Serrasalmus rhombeus formely Serrasalmus niger) out of water. Comparison, with both showing sharp teeth. Rio Negro, Amazonas, Br...
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Paul D Stewart / 1824 Double quarto Plate XL of Megalosaurus' jaw and teeth drawn by Mary Moreland (modern tinting), from William Buckland's 'Notice on the Megalosaurus or great Fossil Lizard of Stonesfield'. Transact...
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Paul D Stewart / Illustration of bear skulls of living and extinct species, engraving in Cuvier's 'Ossamens Fossiles' (1812). Cuvier, the master of comparative anatomy, referenced modern species with extinct fossils t...
