Principal Component Analysis showing the morphospace of the contemporary whitefish species C. acrinasus, C. alpinus, C. steinmanni, C. albellus, C. profundus and C. fatioi from Lake Thun A, B shape PCA of the first vs. the second or third PC-axes explain together 56.5% of the variation in shape and are based on all 48 measured linear morphological characters (Table 1). The proportion of variance explained by each shape PC is given in brackets and the PC-loadings and amount of shape variation explained by size in Suppl. material 1: Table S2.