Fig. 2
From: First evidence of convergent lifestyle signal in reptile skull roof microanatomy
Skull roof structure in 99 lepidosaurs along their cranial profile. Example skulls for lifestyle classes (a) as sagittal sections in medial view, scale bar = 1 mm, top left: Kentropyx altamazonica ZMB 69836; bottom left: Egernia kingii ZMB 21457; top right: Amphisbaena cubana ZMB 11034; bottom right: †Spathorhynchus fossorium USNM 26317. Loess regressions (lines) with a 95% confidence interval (shaded area) of the compactness (b) and relative thickness (c) of all sampled specimens are grouped by lifestyle. Fully fossorial taxa consistently exceed non- and semi-fossorial taxa in compactness along the entire cranial profile and in relative thickness in the profile’s anterior half