During feld surveys of myxomycetes in Central America, 2 previously unrecorded genera and 4 species, viz. Craterium muscorum Ing, Dictydiaethalium dictyosporum Nann.-Bremek., Physarina echinocephala Höhn, and Stemonaria
rufpes, were identifed. Some of these are new for the Neotropics. These noteworthy range extensions of these species
to the Mesoamerican biodiversity hotspot adds to our knowledge of rarely recorded myxomycetes worldwide. Images
of the more relevant taxonomic characters are provided, and for some species, this is the frst illustrations with macro
and microphotographs and scanning electron microscopy images.