Extended Data Figure 3: Morphometric landmarks used to quantify primaxial shape variance and regionalization in pre-cloacal vertebrae of Mus and Alligator.
From: Evolution of the snake body form reveals homoplasy in amniote Hox gene function
a, b, Elements for both Mus (a) and Alligator (b) are, from top to bottom: first post-atlanto-axial vertebrae, third thoracic (Mus) and sixth dorsal vertebrae (Alligator), last lumbar vertebrae. See Extended Data Table 2 and Supplementary Information for description of landmarks and discussion of landmark selection.