A fragment of upper jaw fossil from the Early Cretaceous is among the oldest examples of a toothless amphibian in the fossil ...

They also noted that in addition to having lower-jaw–based fangs, the frogs also had what was described as gland-like tissue ...

This never-before-seen species of frog had a ribbon of tiny teeth on its upper jaw and two small fangs protruding from its lower jaw. (Frogs usually only have teeth on their upper jaw.) ...

A groundbreaking study has shed light on how lizards and snakes -- the most diverse group of land vertebrates with nearly 12,000 species -- have evolved remarkably varied jaw shapes, driving their ...

and use his or her thumb to gently pull the skin of the frog's lower jaw downwards. He or she can then use the dominant hand to carefully open the frog's mouth with an oral speculum or with his or ...