Figure 4 in Systematics of dusky salamanders, Desmognathus (Caudata: Plethodontidae), in the mountain and Piedmont regions of Virginia and North Carolina, USA

Figure 4. Variation in allozyme frequencies at six marker loci that differ between Desmognathus planiceps and Desmognathus fuscus (Clades A and B, Fig. 3). The shading of the small circles (collecting localities) indicates mitochondrial DNA (mtDNA) sequence clades. 'Xs' indicate localities where sequence data are lacking. Insets show allozyme frequencies in Population 1 (Massachusetts).