Fig. 1From: Characterization of tri and tetra-nucleotide microsatellite loci for the freshwater snails Promenetus exacuous (Planorbidae) and Valvata tricarinata (Valvatidae) and their utility in population genetic studiesResults of STRUCTURE cluster membership analyses for a Promenetus exacuous and b Valvata tricarinata for K = 2. Vertical bars represent proportion of membership of individual snails for two genetic clusters (gray = Round Lake, black = Lake Saratoga). Labels below graphs indicate original sample sitesBack to article page