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- W2922087948 abstract "We described a fossil small mammal assemblage from La Mesada (2250 m), Tafí valley, Tucumán, Argentina, recovered from levels referred to late Pleistocene – early Holocene. Gastric corrosion in bones and teeth indicates that the assemblage was generated by the trophic activities of owls. The assemblage is composed by 14 species of rodents: 12 living (Abrothrix illutea, Akodon spegazzinii, Oxymycterus sp., Andinomys edax, Oligoryzomys brendae, Oligoryzomys cf. O. occidentalis, Calomys cf. C. musculinus, Phyllotis sp., Reithrodon auritus, Cavia cf. C. tschudii, Galea leucoblephara, and Ctenomys sp.), one extinct (†Tafimys powelli), and one indeterminate (Sigmodontinae indet.). The sample is characterized by the remarkable dominance of R. auritus (53%) in contrast to its low frequency in other fossil and present-day samples in the area, the presence of †T. powelli, and the absence of one species currently present in the valley (Necromys lactens). The fossil sample shares general similarities with other late Pleistocene – early Holocene assemblages in northwestern Argentina, but there are relevant qualitative and quantitative differences. Although all living species of the fossil sample occur in sympatry in the same area, its quantitative representation (dominance of R. auritus and a higher proportion of herbivore species) is coherent with paleoenvironments with a clear predominance of highland grasslands, involving both the descent and contraction of the vegetation belts on mountain slopes. However, it cannot be discarded that the current scarcity of R. auritus is more related to the anthropic impact than to the prevailing climate in the valley." @default.
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- W2922087948 date "2019-03-20" @default.
- W2922087948 modified "2023-10-18" @default.
- W2922087948 title "Evolution of Small Mammal Communities during the Late Quaternary in a Middle-Altitude Valley of Northwestern Argentina" @default.
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- W2922087948 doi "https://doi.org/10.5710/amgh.11.02.2019.3241" @default.
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