Fossil shark tooth

Numéro d’image : 11557337
Fossil shark tooth
Fossil shark tooth (Cretolamna biariculata). Example of the tooth of this Late Cretaceaous (approx 70mya) mackerel shark. 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. The broad pointed shape indicates a probable diet of both bony fish and the marine animals that inhabited the oceans at this time. Cretolamna sp. are believed by many to be the direct ancestors of the giant Megalodon
Licence : Droits gérés
Crédit: Science Photo Library / Kidd, Geoff
Taille de l’image : 5138 px × 3425 px
Model Release : Non requis
Property Release : Non requis
Restrictions : -

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