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Physiographic distribution and conservation of Michoacán herpetofauna Gekkonidae 1 — — — 1 Helodermatidae 1 1 — — — Iguanidae 3 1 2 — — Mabuyidae 1 1 — — — Phrynosomatidae 20 5 15 — — Phyllodactylidae 5 — 3 2 — Scincidae 6 — 6 — — Sphenomorphidae 1 1 — — — Teiidae 8 3 4 1 — Xantusiidae 1 — 1 — — Subtotals 58 16 37 4 1 Boidae 1 1 — — — Colubridae 28 12 15 1 — Dipsadidae 33 9 19 5 — Elapidae 4 2 2 — — Leptotyphlopidae 4 2 1 1 — Loxocemidae 1 1 — — — Natricidae 11 3 7 1 — Typhlopidae 1 — — — 1 Viperidae 10 2 7 1 — Xenodontidae 2 — 2 — — Subtotals 95 32 53 9 1 Totals 161 54 92 13 2 Sum Totals 215 70 122 20 3 3. The EVS system Rena bressoni. The Michoacán slender blindsnake is a state endemic, and its distribution is limited to the Balsas-Tepalcatepec Depression. Its EVS has been estimated as 14, placing it at the lower end of the high vulnerability category, it has been judged as Data Deficient by IUCN, and SEMARNAT considers it a Special Protection species. This individual was found in the municipality of Tacámbaro in Michoacán. Photo by Oscar Medina-Aguilar. Amphib. Reptile Conserv. | http://amphibian-reptile-conservation.org 162 September 2013 | Volume 7 | Number 1 | e71
Alvarado-Díaz et al. Crotalus basiliscus. The west coast Mexican rattlesnake is distributed from southern Sonora to northwestern Michoacán. In Michoacán, it is found in the Coastal Plain, Sierra Madre del Sur, and the Balsas-Tepalcatepec Depression physiographic provinces. Its EVS has been reported as 16, placing it in the middle of the high vulnerability category, it has been assessed as Least Concern by IUCN, and it is regarded as a Special Protection species by SEMARNAT. This individual is from San Mateo, on the coast of Jalisco. Photo by Oscar Medina-Aguilar. Crotalus pusillus. The Tancitaran dusky rattlesnake is found in the Sierra de Coalcomán region of the Sierra Madre del Sur and the western portion of the Transverse Volcanic Axis. Its EVS has been estimated as 18, placing it in the upper portion of the high vulnerability category, it has been assessed as Endangered by IUCN, and it is considered as Threatened by SEMARNAT. This individual came from Cerro Tancítaro, the highest mountain in Michoacán, located in the west-central portion of the state. Photo by Javier Alvarado-Díaz. The EVS (Environmental Vulnerability Score) system of conservation assessment first was applied to the herpetofauna of Honduras by Wilson and Mc- Cranie (2004). Since that time, this system has been applied to the herpetofaunas of Belize (Stafford et al. 2010), Guatemala (Acevedo et al. 2010), Nicaragua (Sunyer and Köhler 2010), Costa Rica (Sasa et al. 2010), and Panama (Jaramillo et al. 2010). In this special Mexico issue, the EVS measure also has been applied to the herpetofauna of Mexico (Wilson et al. 2013a,b). In this paper, we utilized the scores computed by Wilson et al (2013a,b), which are indicated in Table 7 and summarized in Table 11 for the 208 species for which the scores are calculable. We arranged the resultant scores into three categories (low, medium, and high vulnerability), which were established by Wilson and McCranie (2004). The EVS for members of the Michoacán herpetofauna range from 3 to 19 (Table 11). The lowest score of 3 was calculated for three anurans (the bufonid Rhinella marina, the hylid Smilisca baudinii, and the ranid Lithobates forreri) and one snake (the leptotyphlopid Epictia goudotii). The highest value of 19 was assigned to the viperid Crotalus tancitarensis. The summed scores for the entire herpetofauna vascillate over the range, but still generally rise from the lower scores of 3 through 5 to peak at 14 and decline thereafter (Table 11). Similar patterns are seen for amphibians and reptiles separately, although the species numbers for amphibians peak at an EVS of 13 instead of 14, as is the case for reptiles. Amphib. Reptile Conserv. | http://amphibian-reptile-conservation.org 163 September 2013 | Volume 7 | Number 1 | e71
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Xenosaurus tzacualtipantecus. The Z
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Table 1. IUCN Red List categorizati
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Families Number of species Environm
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Wilson et al. Barisia herrerae* EN
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Wilson et al. Rena boettgeri* NE 5
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Taxonomy and conservation of the co
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pectinata (threatened), and Eretmoc
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Taxonomy and conservation of the co
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Pseudoeurycea naucampatepetl. The C
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