Overall phenotype similarity. Amounts of explained variation by PCA of a high-resolution set of metric variables (155 linear dimensions among individual landmarks) in total samples of individual sites. Note two distant clusters: A the sites of the Carpathian region and those from the deeper Quaternary past; C the sites from the Bohemian Massif (Bohemia + Moravia) with B a dense cluster of Býčí, Barová, and Dzeravá situated in between.