ABSTRACT. Many studies have demonstrated the ecological relevance and great biodiversity of bats in Brazil. However, mountainous areas have been disproportionately less sampled, mainly in the Southeast. The aim of this study was to identify and compare the richness and diversity of Phyllostomidae, the most diverse bat family, in diff erent forest types in Parque Estadual do Ibitipoca, trying to understand the causes of possible diff erences. The Parque Estadual do Ibitipoca is inserted in the Serra da Mantiqueira's domain, in an Atlantic Forest region known as "Zona da Mata", state of Minas Gerais, with an altitudinal range between 1200-1784 meters. The study was conducted in two forest types, classifi ed as "Nanofl oresta Nebular" and "Floresta Nebular", whose respective data on richness and diversity were compared. The bats were captured with 8-10 mist nets for 14 months (April 2011 to May 2012) and four nights per month totaling 62,171.25 m 2 h of capture eff ort. A total of 392 captures (12 species) belonging to the Phyllostomidae family were obtained. The most abundant species were Sturnira lilium (59.9%), Platyrrhinus lineatus (11.3%), Artibeus lituratus (8.7%) and Carollia perspicillata (7.6%). The two sampled areas presented diff erences in bat richness, diversity and species composition, and this diff erence was predominantly infl uenced by S. lilium. It is likely that the observed diff erence in the assembly of bats between the two study sites depends on the variation in fl oristic composition. The records of A. lituratus and P. lineatus in a few months of the year and close to Ficus mexiae bearing ripe fruits suggests that at least these species move to the park for a few periods of the year in search of food resources, possibly moving through the altitudinal landscapes.KEYWORDS: Atlantic Forest, bats, Serra da Mantiqueira.RESUMO. Assembleia de Phyllostomidae (Chiroptera: Mammalia) em fl orestas altitudinais no Parque Estadual do Ibitipoca, sudeste de Minas Gerais, Brasil. Muitos trabalhos têm demonstrado a relevância ecológica e a grande diversidade de morcegos no Brasil. Contudo, áreas montanhosas têm sido desproporcionalmente menos amostradas, principalmente na Região Sudeste. O objetivo principal deste estudo foi inventariar e comparar a riqueza e diversidade de morcegos Phyllostomidae, a mais diversa família de morcegos, em diferentes formações fl orestais no Parque Estadual do Ibitipoca, buscando compreender as causas das possíveis diferenças encontradas. O Parque Estadual do Ibitipoca está inserido nos domínios da Serra da Mantiqueira, em área de Mata Atlântica, na Zona da Mata do estado de Minas Gerais, cujas altitudes variam de 1.200 a 1.784 metros. O estudo foi conduzido em dois tipos de fl orestas, classifi cadas como "Nanofl oresta Nebular" e "Floresta Nebular", cujos respectivos dados sobre riqueza e diversidade foram comparados. Os morcegos foram capturados com 8-10 redes de neblina por 14 meses (entre abril de 2011 a maio de 2012) e 4 noites por mês, totalizando 62.171,25 m 2 h de esfor...