An updated biogeographic evaluation of endemism and conservation of small mammals from Chile.

This article focuses on the biogeographic patterns of small mammals in continental Chile, analyzing how ecological factors such as temperature and precipitation influence species distribution, richness, and endemism. Using a database of 89 species across marsupials, armadillos, bats, and rodents, the study identifies three main climatic biogeographic units—Arid, Temperate, and Polar—and two primary areas of endemism in northern and southern Chile, with a biodiversity hotspot in the south-central region. The research also links species distribution patterns with conservation status from the IUCN Red List, finding that species of greater conservation concern tend to have restricted and overlapping ranges. These findings highlight the importance of climatic variables in shaping small mammal diversity and suggest that conservation strategies should consider both threatened and widespread species within these biogeographic contexts.