Appendix S1 - Oscillation of an Anuran Hybrid Zone: Morphological Evidence Spanning 50 Years

Specimens examined. CMNAR = Canadian Museum of Nature, Amphibian and Reptile Collection, RM = Redpath Museum, McGill University, FWS = F.W. Schueler (Canadian Museum of Nature). Specimens collected as vouchers and used to examine artifact of shrinkage in preservative are indicated with an asterisk (*). (DOC)