What's even more interesting about this species is it has teeth on its lower jaw, a trait that's believed to have vanished in frogs since they first appeared in the fossil record over 200 million ...

In a new study, biologists laid to rest a century-old debate by confirming that a single species of frog, out of the more than 7,000 living today, has true teeth on its lower jaw. The culprit, a ...

How teeth develop The teeth in the upper jaw are called as maxillary or upper teeth, and those on the lower jaw are called as mandibular or lower teeth. Then each jaw has two side-to-side halves.