The present work aims to improve the knowledge of the Metteniusaceae species found in Reserva Ducke. The study is based on morphological analysis of material deposited in herbaria and literature revision. Five species were recorded: Dendrobangia boliviana, Emmotum acuminatum, E. amazonicum, Poraqueiba guianensis and P. sericea. An identification key, descriptions, illustrations, data on habitat, phenology, and species geographic distribution are provided.