Late Pleistocene Mammuthus and Cuvieronius (proboscidea) from Térapa, Sonora, Mexico
| Autor: | Sandra L. Swift, Joaquín Arroyo-Cabrales, Jim I. Mead |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010506 paleontology
Archeology Global and Planetary Change geography.geographical_feature_category Marsh 010504 meteorology & atmospheric sciences biology Pleistocene Fauna Geology biology.organism_classification 01 natural sciences Archaeology Gomphothere Proboscidea Grassland Geography Cuvieronius Ecology Evolution Behavior and Systematics 0105 earth and related environmental sciences Mammoth |
| Zdroj: | Quaternary Science Reviews. 223:105949 |
| ISSN: | 0277-3791 |
| Popis: | What is currently known about Mexico paleontology and specifically the proboscideans has centered in the central and southern states, with much of the north largely unknown. Here we report on Cuvieronius (Gomphotheriidae) and Mammuthus (Elephantidae) recovered from Terapa, a Late Pleistocene site in east-central Sonora. The local fauna reflects a badlands environment along the Rio Moctezuma, 183 km (114 mi) south of the Arizona border. The recovery of Bison places the locality within the Rancholabrean Land Mammal Age. Chronological analyses confirm that impounding basalt and fossiliferous sediments were deposited 43,000 to 40,000 years ago (MIS 3). Cuvieronius and Mammuthus are found throughout the stratigraphic profile. A review of Late Pleistocene collections indicates that Mammuthus, Cuvieronius, and one location of Mammut are known from Sonora. The Late Pleistocene along the Terapa river valley is reconstructed as cooler, with a more equable, less seasonal environment than today. The corridor was wetter, more tropical and included a riparian forest, ponding water, marsh, and savanna grassland. The area west of Terapa in western Sonora had a cooler summer climate, more winter rains and less summer rains. Woodlands and shrub communities occupied the upper bajadas and rocky hills, areas possibly where Mammut ranged more commonly. Valleys contained more grasslands than they do today. The environments and climates of valleys permitted Cynomys, Mammuthus, and Cuvieronius to exist over most of western Sonora where they are extinct today. |
| Databáze: | OpenAIRE |
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