Fossil shark tooth (Carcharias vincentii). Example of the tooth of this Eocene (60mya - 32mya) shark which is related to modern day Grey Nurse Sharks. The pointed shape of the tooth indicates a diet probably consisting 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 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Kidd, Geoff |
Bildgröße: | 3425 px × 5138 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |