Shark & Ray teeth
For more fish see also Solnhofen & Fish section
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Shark + ray teeth
Shark teeth are the most common found fossils of vertebrates. Not only because sharks
already evolved in the Devonian, but also because their teeth are hard and easily
fossilize and because a shark constantly replaces them. A shark has several rows of teeth,
and can produce up to 15,000 teeth during its life. Other parts of a shark rarely
fossilize. A shark skeleton consists of cartilage that hardly fossilizes since it is very
soft.
The biggest shark that ever lived was Carcharodon megalodon. It was a white shark species
that lived in the Miocene and Pliocene. It must have grown to about 15-18 m (50-60 ft) in
length. Carcharodon teeth can be 20 cm (8 in) long. The height of its wide open jaws must
have been about 1,5 m (5 ft). Its main food source were probably whales. Luckily it’s
extinct!
While sharks have sharp, pointed teeth, rays have teeth with flattened surfaces that fit
together like a mosaic to form bony plates. Many rays use these plates to crush the shells
of invertebrate prey.
Bibliography:
La faune de l’Yprésien de la Belgique, E. Casier, 1946, Musée Royal d’Histoire
Naturelle de Belgique (Brussels, Belgium)
Les poissons tertiaires de la Belgique, M. Leriche, 1951, Institut Royal des Sciences
Naturelles de Belgique (Brussels, Belgium)
Die Selachier und Chimären des unteren Meeressandes und Schleichsandes im Mainzer Becken,
T. Reinecke, 2001, Palaeo Publ. (Mortsel, Belgium)
Fossil shark teeth of the world, J. Cocke, 2002, Lamna Books (Torrance, US)
Megalodon, hunting the hunter, M. Renz, 2002, PaleoPress (Lehigh Acres, US)