In fish, the pelvic fins bear no weight and the pelvic girdle is not attached to the axial skeleton. In amphibians, the pelvic girdle is attached to one vertebra. In the early reptiles, the pelvic ...

In fish, the pelvic girdle is not attached to the vertebral column. As a result, any weight put on girdle would push it into soft tissues. In amphibians, girdles and limbs become attached to vertebral ...

Unlike nearly all fossil fish of that age ... It is the oldest example from the fossil record to show a segmented vertebral column (a sort of backbone), hence its name—Greek for "ancient ...