Table 3. Procrustes distances between mean shapes of species after standardization to common linear dimensions (significant at P<0.0001).

	AS	AT	CG
Common head length
AT	0.0806
CG	0.1783	0.1265
MA	0.1536	0.1183	0.1136
Common head width
AT	0.0862
CG	0.1798	0.1651
MA	0.1510	0.1455	0.1146
Common area
AT	0.1016
CG	0.1392	0.0509
MA	0.1416	0.0850	0.1103
Common centroid size
AT	0.0936
CG	0.1581	0.1047
MA	0.1448	0.1196	0.1077

AS, Arvicola sapidus; AT, Arvicola terrestris; CG, Clethrionomys glareolus; MA, Microtus arvalis.