-(Richness of rust fungi on host plants in Belém Metropolitan Area, Pará State, Brazil). This study had as objectives: to survey the fungi that cause rust (Pucciniales) in RMB, to identify species of rust parasitizing plants of economic interest, and to present findings of new records to South America, Brazil, Amazon and Pará, thus broadening the knowledge of the richness of the group and the relationships with their host plants. Collections were made in RMB in 2011-2013 period, and the MG (MPEG) and IAN (EMBRAPA) herbaria were revised. The RMB presented 76 species and 20 genera of Pucciniales. Fourteen species are new records: South America (one), Brazil (one), Amazon (five), State of Pará (one), and RMB (six). Twenty species of rust parasitize plants of economic interest. The RMB has the highest Pucciniales richness in the Amazon. Keywords: Amazon, phytopathogens, Pucciniales, survey RESUMO -(Riqueza de fungos causadores de ferrugens em plantas hospedeiras da Região Metropolitana de Belém, PA, Brasil). Este estudo teve por objetivos inventariar os fungos causadores de ferrugens (Pucciniales) na RMB, identificar espécies de ferrugens que parasitam plantas de interesse econômico, apresentar novos registros para a América do Sul, Brasil, Amazônia e Estado do Pará, e assim ampliar o conhecimento sobre a riqueza do grupo e da relação com suas plantas hospedeiras. Foram realizadas coletas na RMB no período de 2011-2013, e revisados os herbários MG (MPEG) e IAN (EMBRAPA). A RMB apresentou 76 espécies e 20 gêneros de fungos Pucciniales. Quatorze espécies são novos registros: para a América do Sul (uma), Brasil (uma), Amazônia (cinco), Estado do Pará (uma) e RMB (seis). Vinte espécies de ferrugens parasitavam plantas de interesse econômico. A RMB apresenta a maior riqueza de espécies de Pucciniales estudada na Amazônia.

-(First record for Brazil of Maravalia bolivarensis Y. Ono (Pucciniales) parasitizing Manilkara sp.(Sapotaceae)). This study presents a taxonomic treatment of the phytopathogenic fungus Maravalia bolivarensis (Pucciniales) causing rust in plants of Manilkara sp. (Sapotaceae), in the Amapá National Forest, Amapá State, Brazil. Previously known only from Venezuela, this is the fi rst record of M. bolivarensis for Brazil, and its original distribution is extended to the Amazon Biome. Morphological descriptions, illustrations of the microstructures, examined material, geographic distribution and taxonomic comments are provided for this species. Additionally, Maravalia sapotae (Mains) Y. Ono was also recorded in the Amapá National Forest and is being referred here for the fi rst time to the state of Amapá. Finally, an identifi cation key including species of the teleomorph genera Achrotelium, Catenulopsora and Maravalia that occur on plants of Sapotaceae in Brazil is presented.