Abstract The family Physaraceae (Physarales, Myxomycetes) is represented in Brazil by eight genera and 75 species. Based on data obtained from the GBIF, SpeciesLink, Flora and Funga do Brasil platforms, collections from the IPA and URM Herbaria and material collected since 1960 deposited in the UFP Herbarium, the microhabitats and distribution of Badhamiopsis (1sp.) and Badhamia (10 spp.) in Brazilian biomes are commented. An identification key for the species and the first report of B. melanospora from the state of Paraíba, B. panicea from the state of Paraná and B. ovispora from Brazil are presented. Physarales, Physarales (Physarales Myxomycetes 7 GBIF SpeciesLink platforms 196 Herbarium 1sp. 1sp sp (1sp. 10 (1 spp. spp commented B Paraíba presented 19 (1sp 1 (

Utilizando-se o teste de difusão em meio sólido, detectou-se atividade antibacteriana em extratos de Physarella oblonga (Physaraceae) obtidos a partir de imobilização plasmodial e do plasmódio in natura. Os extratos foram ativos contra Staphylococcus aureus (halos=14 mmf) e Mycobacterium smegmatis (halos=12 mmf e 13 mmf). Menor inibição foi observada frente a Bacillus subtilis (halos=10 mmf e 9 mmf) e Pseudomonas aeruginosa (halos=10 mmf e 8 mmf). Escherichia coli apresentou resistência a todos os extratos testados. O cromatograma evidenciou semelhanças na composição química dos extratos, justificando as similaridades no potencial inibitório de ambos, sendo as substâncias com Rf 0,91 e 0,82, presentes em ambas as amostras, os prováveis inibidores do crescimento bacteriano.

Diffusion solid medium test was used to detect antibacterial activity in Physarella oblonga (Physaraceae) extracts obtained from plasmodial immobilization and in natura plasmodium. The extracts presented activity against Staphylococcus aureus (halos=14 mmf) and Mycobacterium smegmatis (halos=12 mmf e 13 mmf). Slower inhibition was obtained against Bacillus subtilis (halos=10 mmf e 9 mmf) and Pseudomonas aeruginosa (halos=10 mmf e 8 mmf). Escherichia coli presented resistence to all tested extracts. The chromatogram revealed likeness in the chemical composition of the extracts, explaining similarities in inhibitory potential. The substances with Rf 0,91 and 0,82, present in both extracts, could be inhibitor agents of bacterial growth.