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Udrizar Sauthier, D.E.; D'Agostino, R.
Holocene mammals
2017  Book Chapter

Here we document the taxonomic composition of the terrestrial mammal assemblage registered in seven Late Holocene paleontological sites (3500 years BP) from Reserva de Vida Silvestre San Pablo de Vald‚s (RSPV) and its surroundings (Chubut province, Argentina). We identified anatomically and taxonomically 9133 osteological remains (about 3858 individuals). Nineteen species were recorded: nine rodents, seven carnivores, two armadillos and one marsupial. Among rodents, the dominant group (96.57%), _Ctenomys _sp. was the most abundant taxon (84.26%). The second dominant group was that of carnivores (1.5%). _Dusicyon avus_ (recently extinct), _Lestodelphys halli_ (regionally extirpated), and _Lyncodon patagonicus _(either extirpated or drastically reduced in abundance) were also detected in the holocene assemblage. Other species currently frequent in coastal communities of small mammals, such as _Calomys musculinus_, _Thylamys pallidior _and_ Akodon dolores_, were either present in very low proportions (<0.4%) or absent. The composition of terrestrial mammal assemblages in RSPV has not remained stable over the last thousand and even hundred years during which changes in relative abundance, ingressions and extinctions of species were registered. This evidences a dynamic scenario in relation to the composition of terrestrial mammal communities whose study leads to the assumption that important biogeographic changes have occurred along a short time lapse

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