[PDF] The pectoral fin of Tiktaalik roseae and the origin of the tetrapod limb | Semantic Scholar
@article{Shubin2006ThePF, title={The pectoral fin of Tiktaalik roseae and the origin of the tetrapod limb}, author={Neil H. Shubin and Edward B. Daeschler and Farish A. Jenkins}, journal={Nature}, year={2006}, volume={440}, pages={764-771}, url={https://api.semanticscholar.org/CorpusID:4412895} }
The pectoral appendage of a member of the sister group of tetrapods, Tiktaalik roseae, is described, which is morphologically and functionally transitional between a fin and a limb.