Jawed vertebrates account for more than 99% of modern vertebrate diversity. Collectively, they comprise chondrichthyans (sharks, rays, and chimaeras) and osteichthyans (bony fishes and terrestrial vertebrates, including humans). The anatomy of jawed vertebrates includes a series of complex traits such as jaws, teeth, paired appendages, and novel skeletal tissues such as bone. In spite of the inten ...