LISTA DE ESPECIES, ENDEMISMO Y CONSERVACIÓN DE LOS DE MAMÍFEROS DE COSTA RICA
Historically the geographical position of Costa Rica has played an important role in the composition and diversity of our mammalian fauna, consisting of species originating both in the Neartic and Neotropical regions. Based on published data, new descriptions and reports, we present an updated list of all terrestrial and aquatic Costa Rican mammals. We summarize available information on their status, and present our concerns regarding those species with populations under alarming conditions. The mammalian fauna of Costa Rica is mainly Neotropical. A total of 238 species, grouped in 142 genera and 44 families, were documented. The order Chiroptera is the most diverse, followed by Rodentia, Cetacea, and Carnivora. About 7 % of the species are endemic to Costa Rica (or Costa Rica-Nicaragua, Costa Rica- Panama). Unfortunately, despite of all the efforts to protect our fauna and flora, threats to Costa Rican mammals are increasing, and a number of species have gone, and are going extinct. As in most other areas, habitat loss, both in terrestrial and coastal ecosystems, poses
Published in 2004.