New limbs from old fins, part 2

Titktaalik roseae.
Image from
https://tiktaalik.uchicago.edu/index.html

The second post in my series on limb evolution is now up at the BioLogos site. This installment reviews the fossil evidence on fin-to-limb evolution, introducing the famous Tiktaalik. Next up: evidence from developmental biology.
The first post at BioLogos outlined limb structure and some historical background. The series at BioLogos was spawned by an idea here at QoD, which aimed to discuss some new findings in the fins-to-limbs story. Those new findings will be discussed in the final installment of the series at BioLogos.

*Edit July 2020: The series was consolidated into a single article on the BioLogos site. The link now goes to that single article.