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Perez-Crespo V.A.,National Autonomous University of Mexico | Arroyo-Cabrales J.,Laboratorio Of Arqueozoologia M En C Ticul Alvarez Solorzano | Alva-Valdivia L.M.,National Autonomous University of Mexico | Morales-Puente P.,National Autonomous University of Mexico | And 2 more authors.
Neues Jahrbuch fur Geologie und Palaontologie - Abhandlungen | Year: 2016

The diet and habitat of 47 horse individuals belonging to the genus Equus from eight Mexican localities of Late Pleistocene age were determined using δ13C and δ18O values of their apatite carbonate. The δ13C values indicated that, on average, these animals were C3/C4 mixed feeders. Some individuals, however, only ate C4 plants. Some the C3/C4 mixed feeders had significant consumption of C3 plants independent of the altitude, latitude and longitude where they were living. The type of habitat inferred was an open zone with some degree of tree coverage. These results indicated that this genus in the Mexican Pleistocene was more generalist in its diet and habitat than previously suspected. © 2016 E. Schweizerbart'sche Verlagsbuchhandlung, Stuttgart, Germany. Source


Perez-Crespo V.A.,National Autonomous University of Mexico | Schaaf P.,National Autonomous University of Mexico | Solis-Pichardo G.,National Autonomous University of Mexico | Arroyo-Cabrales J.,Laboratorio Of Arqueozoologia M En C Ticul Alvarez Solorzano | And 2 more authors.
Geological Magazine | Year: 2016

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 Potosí, central México. 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. ©Cambridge University Press 2016. Source


Gonzalez-Ruiz N.,Metropolitan Autonomous University | Ramirez-Pulido J.,Metropolitan Autonomous University | Arroyo-Cabrales J.,Laboratorio Of Arqueozoologia M En C Ticul Alvarez Solorzano
Mammalian Biology | Year: 2011

We describe a new species of mastiff bat (Molossus) from Mexico on the basis of 46 specimens that differ from all other species of Molossus in size, pelage coloration, and morphological characteristics. The new species is most similar to, and specimens were previously identified as, M. sinaloae; but there is no overlap in most skull measurements and the two species differ in development of sagittal and lambdoidal crests and in certain dental characteristics. M. sinaloae occurs in the dry, low tropical deciduous forest of the Pacific versant of Mexico from Sinaloa to Chiapas, a large geographic gap separates it from the new species, which has been found only in the Yucatán Peninsula. Una nueva especie del género Molossus es descrita con base a 46 ejemplares de colecciones científicas. Esta nueva especie se puede distinguir de las otras especies del género Molossus por el tamaño, la coloración del pelaje y otras características morfológicas. Durante muchos años este nuevo murciélago fue confundido como M. sinaloae, pero la mayoría de las medidas craneales no se sobreponen entre las 2 especies, además el desarrollo de las crestas sagital y lamboidea y las características dentales son diferentes. M. sinaloae se distribuye en Mexico en la vertiente del Pacífico desde Sinaloa hasta Chipas dentro de selva baja caducifolia, y existe una amplia interrupción geográfica que la separa de la nueva especie, la cual se encuentra en la Península de Yucatán. © 2010 Deutsche Gesellschaft für Säugetierkunde. Source


Perez-Crespo V.A.,National Autonomous University of Mexico | Ulloa-Montemayor X.,National Autonomous University of Mexico | Acosta-Ochoa G.,National Autonomous University of Mexico | Arroyo-Cabrales J.,Laboratorio Of Arqueozoologia M En C Ticul Alvarez Solorzano | And 3 more authors.
Revista Mexicana de Biodiversidad | Year: 2012

We present isotopic values of δ13C and δ18O obtained from dental enamel in a brocket deer individual found in an archeological site. Those values show that the individual had a browser in an area of closed vegetation. Source


Perez-Crespo V.A.,National Autonomous University of Mexico | Arroyo-Cabrales J.,Laboratorio Of Arqueozoologia M En C Ticul Alvarez Solorzano | Alva-Valdivia L.M.,National Autonomous University of Mexico | Morales-Puente P.,National Autonomous University of Mexico | Cienfuegos-Alvarado E.,National Autonomous University of Mexico
Revista Mexicana de Ciencias Geologicas | Year: 2012

Using bioegeochemical markers δ 13C and δ 18O, we determined the diet and habitat of three extinct mammals: Camelops hesternus, Equus sp. and Mammuthus columbi, found in Laguna de las Cruces (San Luis Potosí, México). The statistical comparisons assayed among them showed that there are not differences in their diet since all of them may be classified as C 3/C 4 mixed feeders. Camelops hesternusused to have the major consumption of C 4 plants, meanwhile Mammuthus columbi and Equus sp. ate more C 3 plants. Those little differences in their feeding habits should explain their coexistence them at the site, that was a grassland with some trees, during Late Pleistocene. Source

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