The on-going global climate change is a very effective and important factor on the distribution and diversity of living organisms. As with all living populations, Myxomycetes are undoubtedly affected by pollutants, in particular by lead and sulphur dioxide emissions, but probably also to some extent by ozone and oxides of nitrogen with acid precipitation. Today, determining the presence and distribution in myxobiotic group of organisms is important to understand the aspects of biological diversity in ecosystems. In this study, three new species have been recorded and added to Turkish Myxomycetes. All of the specimens are collected from Marmara region of Anatolian Peninsula of Turkey. Despite the fact that two samples of Myxomycetes have been obtained from moist chamber application in the laboratory, the other sample has been isolated from interesting an exceptional manner on a part of potted plant and soil surface, indoor environment. These new records taxon are; Didymium dubium Rostaf., Didymium verrucosporum A.L. Welden (Didymiaceae) and Physarum citrinum Schumach. (Physaraceae).