Fig. 1: Sampling sites for Lampsilis siliquoidea (orange), L. radiata (dark blue), and putative hybrid zone (shaded gray).

White circles represent locations where samples failed to amplify. Map created in ArcGIS version 10.1. Data source: CanadaRivers by ArcCanada3.1; North America State Province Boundaries and United States boundaries states, ESRI; Great Lakes shoreline Geomorphology.5, GLERLl. Projected Coordinate System: WGS_1984_UTM Zone17N.