Víctor Adrián Pérez-Crespo

Diet and habitat definitions for Mexican glyptodonts from Cedral (San Luis Potosí, México) based on stable isotope analysis

Values for δ 13 C and δ 18 O obtained from molar samples from three individuals pertaining to Glyptotherium sp. from Cedral (San Luis Potosi, Mexico) are provided and are utilized to infer general aspects of glyptodont diet and habitat. On average this animal showed a C 3 /C 4 mixed diet, with a high consumption of C 4 plants. Comparisons of the δ 13 C VPDB and δ 18 O VPDB values for glyptodonts with horses, mastodons, mammoths and tapirs from the same locality show that glyptodonts from Cedral lived in an open habitat.

Diet and Habitat for Six American Pleistocene Proboscidean Species Using Carbon and Oxygen Stable Isotopes

Abstract. Diet and habitat were estimated, based on stable isotopes, for six species of proboscideans inhabiting the Americas during the Pleistocene. In North America, Mammuthus columbi (Elephantidae) was a mixed C3/C4 herbivore inhabiting open areas, while Mammut americanum (Mammutidae) fed exclusively on C3 plants and preferred closed areas. In contrast, members of the family Gomphotheriidae showed a wide range of food preference and habitats. This is the case of Cuvieronius tropicus, a mixed-diet herbivore living in open areas. In South America, another gomphothere — Cuvieronius hyodon — inhabited open areas and had a C3-plant diet similar to others from some Southern plains such as Stegomastodon platensis. On the other hand, S. waringi from tropical South America lived in open areas and had a C3/C4 mixed diet. The fact that gomphotheres had more flexible diet habits could explain why those animals were able to cross the Panamanian Isthmus, while mammoths and mastodons did not.

Stable isotopes and diets of Pleistocene horses from southern North America and South America: similarities and differences

The diet and habitat for two Pleistocene Equidae genera that lived in southern North America (southern USA and Mexico) and South America are inferred using carbon and oxygen isotopic data. The South American Hippidion fed upon C3 plants and lived in forest. Equus from both subcontinents were mixed feeders and preferred living in grasslands, prairies, and savannas, while some individuals or populations specialised in consumption of C3 or C4 plants. These results indicate that Equus were generalist in their diet and habitat, while Hippidion were specialists on both traits.

Strontium isotopes and mobility of a Columbian mammoth (Mammuthus columbi) population, Laguna de las Cruces, San Luis Potosí, México

By using strontium isotopic ratios of dental enamel from molars, we were able to reconstruct the migration context for three individuals of a Columbian mammoth population ( Mammuthus columbi ) around Laguna de las Cruces, San Luis Potosi, central Mexico. A three-step leaching procedure was applied to eliminate secondary Sr contributions in the molar enamel. One of the studied individuals showed 87Sr/86Sr ratios similar to those obtained from soils and plants from Laguna de las Cruces and was identified as local, whereas the other two mammoths had different molar 87Sr/86Sr values, indicative of migration and mobility contexts.