Fig. 2

Shell images of Lampsilis siliquoidea, hybrids identified using mitochondrial DNA Lampsilis radiata cluster 1 and L. radiata cluster 2. Localities (left to right) for L. siliquoidea: St. Croix River (MN), French Creek (NY), Ellicott Creek (NY), Lac Chicobi (QC). Hybrids: Sodus Bay (NY), Moira River (ON), Rivière Batiscan (QC), Lac St. Pierre (QC). L. radiata cluster 1: Young Lake (NY), Hudson River (NY), Rivière aux Brochets (QC), Sandy Stream (ME). L. radiata cluster 2: Meherrin River (NC), Little Waccamaw River (NC), Tar River (NC), Lake Marion (SC); L. radiata cluster 2 images by Jamie Smith (North Carolina Museum of Natural Sciences), catalog number for each specimen is shown below each image. Black horizontal bars correspond to 1 cm.