In this study, Myxomycetes samples were collected from Hatay Province of Turkey on various occasions during 2016. As a result of field and laboratory studies, three rare Myxomycetes species were reported for the first time from Turkey. These species are; Physarum murinum A. Lister, Physarum schroeteri Rostaf and Reticularia intermedia Nann.Bremek. P. murinum and P. schroeteri were harvested from moist-chamber cultures in laboratory, and R. intermedia collected from its natural habitat. Morphological, chorological and ecological characteristics of these species were comparatively analyzed. In addition, photographs of these new records were taken by light and scanning electron microscopes (SEM).