Ecological niche models were made for each of the living representatives of the fossil taxa reported at the site. Paleoclimatic reconstruction was assayed using the Mutual Ecogeographic Range method. This is a paleontological and archeological locality that shows a long chronologic sequence, with radiocarbon dates ranging from the Late Pleistocene to historical times, and one of the best records of meso and microvertebrate fossils in South America. As a study case, we present the results of the paleoclimatic analysis of the Tixi Cave site.
The Pampas of Argentina is a large grassland ecosystem located in the oriental region southern of South America. This suggests that the assemblage of fossil species found inhabited the locality during a glacial period. A mean annual temperature of 13.91 ± 1.54 ☌ and an annual precipitation of 964.04 ± 316.82 mm were inferred for the locality. Paleoclimate was reconstructed using the Mutual Ecogeographic Range method, which uses the distribution and climate niche of the nearest extant representatives of the identified fossil taxa. This finding suggests that the mastodon remains were used as burrow by the rattlesnake during the Pleistocene. triseriatus) was found inside the mandible of the American mastodon (Mammut americanum). in Mexico, and the first North American Pleistocene record for the rattlesnake Crotalus triseriatus. We present the first Mexican Pleistocene record of Anolis and Storeria, the third fossil record of the alligator lizard Barisia sp.
In this study, we describe the fossil record of squamate reptiles from the Pleistocene of San José Buenavista (Puebla, Mexico), and the taphonomic relationship between them and the associated megafauna, as well as reconstruct the paleoclimate of the paleontological site in Central Mexico where the remains were found. Pleistocene reptiles have been used as a proxy for qualitative paleoclimatic reconstructions of localities. Taphonomic studies in Pleistocene reptiles are focused on finding out the origin of the paleontological remains that is, if the remains found at a particular place correspond to organisms that lived and died there or if they were carried out and deposited there by water currents or predators. However, reptile fossil records of Pleistocene from Latin America are scarce and limited to presence data associated with records of megafauna remains. Records of Pleistocene reptiles are relatively well known in different countries.
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