Fossil shark tooth (Carcharias africana). Example of the tooth of this Eocene (60mya - 32mya) shark which is related to modern day Grey Nurse Sharks. The thin pointed shape of the tooth indicates a diet primarily of bony fish. Sharks first evolved in the Palaeozoic era (570-245 million years ago). Shark's skeletons are formed of cartilage,a less durable material than bone,consequently there are few fossils of prehistoric sharks. Their teeth are made of a bone-like,enamel-coated substance that is more readily fossilised | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Kidd, Geoff |
Taille de l’image : | 3425 px × 5138 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |