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We provide in this report an annotated list of mammalian species known to occur in the vicinity of Santa Cruz de Ia Sierra in the department of Santa Cruz, Bolivia. This area includes a high diversity of habitats and physical relief. Additionally, the recently activated Parque Nacional de Amboro lies within this region, and includes large tracts of primary subtropical forest. Thus far, 124 species of mammals are known to occur here. Much of this area remains unsampled and future biological research will be highly rewarding. Intensive efforts to further document distributions, collect specimens for systematic studies, and begin detailed ecological investigations should start soon, given the accelerating rate of habitat destruction in lower reaches of the park.


Special Publication Museum of Southwestern Biology 2