The evolution of the mammalian ear is well documented and makes a nice evolutionary story ... In early vertebrates, jaws articulated at the articular (lower) and quadrate (upper) bones. In early ...

Anewly discovered mammal fossil may give clues to how bones in the middle ear evolved from jaw bones, according to a study published in Science yesterday (December 5). The malleus, incus, and ...

During the next 145 million years of evolution ... backward to become the small bones of the middle ear. That's why mammals hear so much better than reptiles." The separation of the jaw and ...

Mammals are familiar ... but tucked away inside the ear. The earliest synapsids, much like reptiles, had lower jaws that were made up of several different bones. Behind the tooth-bearing dentary ...

These changes separate the reptiles ... Evolution of the skull The skull is a skeletal structure found in head region. In the Chondrichthyes, the skull consists of chondrocranium and upper jaw. In the ...

The teeth of horses and zebras look alike. The ear bones of mammals were once the jaws of prehistoric reptiles. And so on. Despite these differences, all mammals share four traits that are shown ...

Evolution is a master recycler. It often uses old structures (or ancient genes) for new jobs. The mammalian ear is a perfect example. Over the eons, the jawbones of our fish ancestors became three ...

The research sheds new light on the mysterious origins of outer ears, which are unique to mammals ... small bones — arose from the jawbones of ancient fish. This example of evolution ...

Tritylodontids were a mammal-like reptile group of herbivores the size of rabbits and hares. They were halfway in the evolution process from reptiles to mammals. The Ono site is the fourth in ...