What can we learn about vertebrate evolution from Tiktaalik that we did not know before?

Question

Quizplus · Accepted Answer

Tiktaalik provided evidence for the evolution of tetrapod limbs, which led to the emergence of terrestrial vertebrates. This was a major transition in vertebrate evolution, and the discovery of Tiktaalik helped fill in the gap between fish and early tetrapods. We already knew about the evolution of vertebrae, jaws, lungs, and gills before the discovery of Tiktaalik.

What Can We Learn About Vertebrate Evolution from Tiktaalik That