Main results of the principal components analysis (PCA) based on the six shape variables of the pollical distal phalanx, including the variable loadings from the rescaled component matrix for the five principal components.

The more significant values across PC 1 and 2 (in bold) are discussed in the text.
Abbreviations: PC  =  principal component; L  =  length; MLT  =  mediolateral width at the tuft; DPS  =  dorsopalmar height at midshaft; MLS  =  mediolateral width at midshaft; DPB  =  dorsopalmar height at the base; MLB  =  mediolateral width at the base. The sixth component was not included because the first five components almost explained the 100% of the total variance.