Pieces of another thin-walled cranium along with upper and lower jaws and teeth came to light in 1963.
The upper and lower jaws were lined with stacked columns of teeth, which appear to have been specialized for shearing.
The salamander can regenerate its limbs, its tail, its upper and lower jaws, the lens and the retina of its eye, and its intestine.
The dentition of the Agamidae is usually described as acrodont, but most species have several pleurodont teeth at the front of the upper and lower jaws.
Young camels retain the full complement of front teeth, with three incisors and one canine in the upper and lower jaws; the upper incisors are extremely small.
These teeth in upper and lower jaws operated like self-sharpening scissors, Dr. Sereno said, with shearing facets that slid past each other when the jaws closed.
The name viperfish comes from the long fangs that protrude from the upper and lower jaws, used to firmly grip struggling prey.
In addition, despite the fact that both the upper and lower jaws of Odontochelys have teeth, there is no question that it is a turtle.
If you need to replace most or all of your teeth, dentures are clearly the cheaper alternative, costing around $2,500 for a set (upper and lower jaws).
No present-day turtles have teeth; rather, the upper and lower jaws bear keratinous sheaths that fit onto the skull like a pair of false teeth.
Most of the drilling was done on the chewing surfaces of their molars, in both the upper and lower jaws, probably using a flint point attached to a bow that made a high-speed drill, the researchers say.
