image/svg+xml
-0.30
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0.10
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0.00
0.10
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PC1
PC2
Hystricomorphy
Myomorphy
Protrogomorphy
Sciuromorphy
Lagomorph
Fossil
L
G
P
It
Id
FIGURE 9. Cranial shape variation across the first two principal components. Boundaries have been superimposed onto extant rodents to indicate the space occupied by members of each anatomical condition of the masseter (inset) with wireframes to indicate general pattern of morphological change along each axis. Id = Ischyromys douglassi (USNM 617532), It = I. typus (USNM 16828), G = Gomphos elkema (MAE-BU 14467), L = Lepus californicus (UMZC
E3941), P = Paradelomys crusafonti (UM ACQ6618). ERRATUM: The wireframes outside of the X and Y axes were reversed (corrected here). Also Dasyprocta (red arrow) was previously figured with a triangle, when it should have been shown with a star to indicate its hystricomorphy (corrected here).