Ten new species of small dictyostelids, five belonging to Acytostelium (A. anastomosans, A. longisorophorum, A. magnisorum, A. serpentarium and A. singulare) and five to Dictyostelium (D. amphisporum, D. naviculare, D. oculare, D. potamoides and D. stellatum), were isolated from forest soils in the Great Smoky Mountains National Park. These species were recovered mostly from acidic soils and at higher elevations. They represent a large group of dictyostelids of small stature (<2 mm total height) on which we are beginning to accumulate more information.