Incluye bibliografías e índice. CONTENIDO: An introduction to historical biogeography and contemporary habitats of Northern South America. -- Order Marsupialia. -- Order Xenarthra (Edentata). -- Order Insectivora. -- Order Chiroptera. -- Order primates. -- Order Carnivora (Fissipedia). -- Order Pinnipedia. -- Order Cetacea. -- Order Sirenia. -- Order Perissodactyla. -- Order Artiodactyla. -- Order Rodentia. -- Order Lagomorpha. -- Speciation and Faunal Affinities of Mammals in the Northern Neotropics. -- Mammalian Community Ecology.