Аннотация:The myxomycetes are soil living giant multinuclear protists that reproduce with spores so they are named by slime molds. These organisms predate bacteria, fungi spores and unicellular algae. These preys live in decaying substrate such as dead wood, leaf litter, the top of the soil and so on. That is why the sporophores of Myxomycetes could be found on these substrates. We have studied their biodiversity in the Polistovsky national reserve since 2018 and here are the results of our investigation.