mHealth Ecosystems and Social Networks in Healthcare

Abstract

The xenarthran fauna recognized for the Ensenadan age is particularlyabundant; Dasypodidae comprise approximately 20% of this fauna.Chaetophractus vellerosus is recorded in the Pampean region from theBonaerian-Lujanian (Middle Pleistocene - Late Pleistocene/EarlyHolocene) to the present, with a current disjunct distribution (acontinuous main area comprising the Gran Chaco and central Argentina,and a secondary area in the coastal region of Buenos Aires Province)attributed to a wider paleodistribution. The materials presented hereare from Ensenadan sediments outcropping at Punta Hermengo (GeneralAlvarado County, Buenos Aires Province), that would have been depositedunder and to semiarid climate conditions. These allow extension of thetemporal distribution of the species to the Ensenadan in the Pampeanregion, as well as representing new evidence to test hypotheses ofdistributional changes related to global climatic variations recognizedfor the Quaternary. In this sense, the current disjunct distribution canbe interpreted as the result of fundamentally humid recent conditionsthat resulted in a relict occurrence of the species in coastal areas.