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Crotalus viridis now 7 species
Douglas, Douglas, Schuett, Porras, & Holycross [2002. Phylogeography of the Western Rattlesnake (Crotalus viridis) Complex, With Emphasis on the Colorado Plateau]. Pp. 11-50. In Biology of the Vipers [Schuett, Höggren, Douglas, and Greene (editors). Eagle Mountain Publishing, Eagle Mountain, Utah. xii + 580 pp. + 16 color plates] split the former Crotalus viridis into seven species: C. abyssus, C. cerberus, C. concolor, C. helleri, C. lutosus, C. oreganus, and C. viridis. Standard common names for these seven evolutionary lineages match exactly those as listed in Collins & Taggart (2002 Standard Common and Current Scientific Names for North American Amphibians, Turtles, Reptiles, and Crocodilians. Fifth Edition. iv + 44 pp.)
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