The second vertebrae is unchanged or somewhat enlarged. Figure: Reptiles have even greater flexibility in their cranio-vertebral joint than do the amphibians, allowing increased head movement.

Despite their differences, reptiles and amphibians share several traits that connect them. Both groups are cold-blooded vertebrate animals, meaning they rely on external heat sources to regulate ...

Fossil evidence has been discovered which shows that reptiles have been on Earth for about 315 million years – the longest of any of the vertebrate groups. It is hard to know exactly how many ...

Reptiles have up to two vertebrae fused together into a sacrum, but to be a dinosaur an animal needs at least three. Some modern birds have up to 12 sacra. These changes likely occurred as a result of ...

A series of long bony vertebrae soar skyward in transcending gothic splendor. Want to keep up with breaking news? Subscribe to our email newsletter. The Harvard Crimson The University Daily ...

is offering an unprecedented glimpse into an extinct marine reptile that swam in ancient seas almost 100 million years ago, ...

Credit must be given to the creator. Original fossil of the New Zealand nothosaur vertebra Computerised tomography image of the New Zealand nothosaur vertebra ...

but instead to a small reptile called a crocodyliform, according to a Feb. 18 study published in the peer-reviewed Journal of Vertebrate Paleontology describing the discovery. More specifically ...