A system for categorizing the distribution of the Mesoamerican herpetofauna. — Larry .. The Herpetofauna of Chiapas, Mexico: composition, distribution, and. the idea of presenting a checklist of the herpetofauna of all northern Cen- .. east facing Honduras and El Salvador, the west contacting Chiapas, Mexico. Herpetofauna in the southern part of the Mexican state of Chiapas, in southern Mexico (–1, m elev.; Fig. 1). .. Scientific collections in Chiapas state; 8.

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Further, five small areas are notable for their richness in reptiles 51—70 species: Based on previous studies, we assume that, if the factors behind the patterns of richness and endemism differ, these patterns at different scales do not necessarily have to chiapae similar chiapzs, because the causal factors of each pattern — richness or endemism — are operating at different scales.

This may explain the variation Table 1 of the relationship between richness and endemism across the country. Photo courtesy of Marisa Ishimatsu. The distribution, ecology and evolutionary history of Plethodontid salamanders in tropical America.

Amphibians and reptiles of the state of Chihuahua, Mexico, with comparisons with adjoining states

State lists used to compare the species composition between Chihuahua and the adjoining states were: To model ranges, there are a variety of algorithms that operate under different assumptions Peterson et al. Projected impacts herperofauna climate and land-use change on the global diversity of birds. However, to explain latitudinal patterns, this hypothesis becomes redundant because there are more species towards the equator.


Some of the data used in this report have been obtained from these funded projects. Indeed, there are species, such as Craugastor tarahumaraensisCtenosaura macrolophaUma paraphygasand Tropidodipsas repleta that are of great conservation concern based on their EVS values Wilson et al.

These results suggest that particular conservation attention should be paid to the Sierra Madre Occidental and the Chihuahuan Desert habitat types in Chihuahua.

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List of species of Mexican herpetofauna, showing endemism and whether or not the species could be modelled. In addition, the more locally appropriate EVS assessments see Wilson et al.

Colubridaewith comments on distribution and conservation. Forty-four are found in the subtropical canyons of the Sierra Madre Occidental.

However, it was not possible to appreciate the subtleties in the pattern of richness in northern Mexico probably because of the lack of locality records in this region, which was amended using species distribution models based on ecological niche. In this sense, to have more species of reptile at the regional level nationwideone would expect local communities of reptiles to generally exhibit higher richness.

All of this, together with new tools permitting the modelling of the distribution areas of the species, has allowed us to obtain a more complete picture and has led to the re-analysis from new perspectives of the patterns of diversity and endemism. In addition, Sonora and Chihuahua share the habitats and species found in the Sierra Madre Occidental. We assume that two groups chiaaps different characteristics, particular ecological requirements and dissimilar evolutionary histories will not share richness and endemism patterns, and that hwrpetofauna factors that influence their distribution and the structure of their communities will be different.


Amphibians and reptiles of the state of Chihuahua, Mexico, with comparisons with adjoining states

Flores-Villela; Patterns of richness and endemism of the Mexican herpetofauna, a matter of spatial scale? We obtained records useful for analysis. Among these states Chihuahua has received a great deal of attention in the study of its herpetofauna. Herpetfauna percent of Chihuahuan species shared by a neighboring state are given in parentheses.

Chihuahua shares the highest proportion of its herpetofauna with Sonora and Durango. Close mobile search navigation Article navigation.

Although it is impossible to entirely eliminate these biases by modelling, it diminishes their influence on the results. Barisia levicollis Stejneger Endemic. Sufficient locality records were available to model of these. Flores-Villela noted that isolation and the variety of environmental conditions owing to rugged topography were primary factors contributing to the radiation and differentiation of herpetofauna species see also Smith et al.

Chihuahua is physiographically complex Fig.

Valid records chiapaa valid species. Crotalus ornatus Eastern Black-tailed Rattlesnake. The Gila Monster Heloderma suspectum is also expected to occur in this part of the state. In Mexico, this latitudinal pattern of richness has been repeatedly observed e. These percentages are similar to those from other recently compiled tallies of conservation statuses for Mexican states Coahuila: