Evidence for this function first came from studies of the organ's anatomy and its nerves as ... belong to a group known as the lobe-finned fishes. Projecting from the body on stalks rather than ...

The animal was a so-called lobe-finned fish that lived about 375 million years ago. Named Tiktaalik rosae by its discoverers, it is a classic example of a transitional form, one that bridges the ...

anatomy, and diverse behaviors. It categorizes fish into three major groups: cartilaginous fish (like sharks and rays), bony fish (ray-finned and lobe-finned), and primitive fish (like lampreys ...