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. 2015 Apr 30;5(10):2095–2114. doi: 10.1002/ece3.1500

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© 2015 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd.

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Location of sample sites for G. agassizii (circles) in California (CA), G. morafkai (squares) in Arizona (AZ), and individuals of undetermined lineage (triangle) in the presumed contact zone (Table1). The California samples represent two different recovery units (RUs); the Colorado Desert RU (FEN, G, CH, and UWV) and the Eastern Mojave RU (SV, IV and IV14), within the distinct population segment (DPS) for G. agassizii as defined by the Desert Tortoise Recovery Plan (USFWS 2011). The boundary of the DPS and the state border between California and Arizona is the Colorado River.