Fig. 2From: Concordant morphological and molecular clines in a contact zone of the Common and Spined toad (Bufo bufo and B. spinosus) in the northwest of FranceSpecies specific morphometric character states across a Bufo spinosus to B. bufo transect in the northwest of France. Data points shown are average values for males in 13 populations (see Table 1). a size and shape of the metatarsus tubercle and b positioning of the parotoidsBack to article page