Skip to main content
. 2009 Jul 22;106(30):12418–12423. doi: 10.1073/pnas.0906380106

Fig. 3.

Fig. 3.

Geographic variation in cranial horn shapes. (A) Cranial horn shape divergence and geometric morphometric landmark positions between P. coronatum complex specimens from Contra Costa County, California (Left; MVZ 33623) and Southern Baja California (Right; MVZ 100473). (B) The Southern Baja California phylogeographic group differs notably from all others in cranial horn shape. Mean landmark positions (average Bookstein coordinates; CS = 1) for each phylogeographic group are shown in relation to the parietal eye (x = 0, y = 0). Males and females produced similar results, and only results for females are shown here.