1861
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Cope, Edward D. Contributions to the ophiology of Lower California, Mexico and Central America. Proceedings of the Academy of Natural Sciences, Philadelphia 13:292-306
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2012
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Cox, Christian L. Phylogenetic systematics, populations genetics, and the evolution of color pattern polymorphism and coral snake mimicry in the snake genus Sonora. Dissertation. University of Texas at Arlington, Arlington, Texas. 159pp.
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2013
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Cox, Christian L. and Alison R. Davis Rabosky. Spatial and temporal drivers of phenotypic diversity in polymorphic snakes. The American Naturalist 182(2):E40-E57
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2014
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Cox, Christian L. and Paul T. Chippindale. Patterns of genetic diversity in the polymorphic ground snake (Sonora semiannulata). Genetica 142:361-370
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