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(Atlantic Forest Myxomycetes: new records for Paraiba State, Northeast Brazil). A Study of the myxomycete biota of Mata do Pau Ferro Permanent Preservation Area (Area de Preservacao Permanente Mata do Pau Ferro - APPMPF) (6 degrees 58’ 12"S; 35 degrees 42 15"W, 400-650 m alt., 600 ha), an Atlantic Forest fragment located in the semi-arid region of Paraiba, was carried Out. Eleven new records of myxomycetes for this state were recorded: Cribraria mirabilis (Cribrariaceae); Licea biforis (Liceaceae); Dictydiaethalium plumbeum, Lycogala exiguum (Reticulariaceae) Macbrideola scintillans, Stemonaria longa, Stemonitis axifera, S. smithii (Stemonitaceae); Metatrichia floriformis, Perichaena chrysosperma, Trichia affinis (Trichiaceae). M. scintillans is reported for the first time in Brazil, and M. floriformis, in the northeastern region. Descriptions based on the material collected in the APPMPF are given for each species and their geographic distribution in Brazil is indicated according to the literature.