Fig. 5: Phylomorphospace of early diapsid reptiles and lepidosaurs.
From: Megaevolutionary dynamics and the timing of evolutionary innovation in reptiles
The first two axes of phenotypic variation among principal coordinates. Early diapsid reptiles occupy a distinct region of the morphospace from lepidosaurs, which in turn, have rhynchocephalians, non-serpentiform squamates, and serpentiform squamates (snakes and amphisbaenians) occupying different regions of the morphospace defined by PCo 1 and 2.
