Axial regionalization in Tiktaalik roseae and the origin of quadrupedal locomotion
T. A. Stewart, J. B. Lemberg, E. Hillan, I. Magallanes, E. B. Daeschler, N. H. Shubin
This study analyzes the axial skeleton of Tiktaalik roseae to show regionalization and sacral ribs, suggesting early evolution of features supporting quadrupedal locomotion before limb development.
bioRxiv · Jan 11, 2023 · PreprintPaleontology