Dictyostelid cellular slime molds (dictyostelids) are important soil microorganisms that feed mostly on bacteria in the soil and leaf litter layer. The Russian Far East is the easternmost part of Russia and thus is located in the Middle East of Siberia. In September 2018, 14 samples of mixed soil/humus were collected from the most southeastern portion of the Russian Far East, including Sakhalin Island, Ussuriysk and Vladivostok, and then processed for dictyostelids. Seven species in four genera were recovered. Four of these species (Cavenderia fasciculata, Heterostelium tenuissimum, Dictyostelium longosporum and Polysphondylium patagonicum) were recorded for the first time from Russia, and one species (H. multibrachiatum sp. nov.) in described herein as new to science.

Dictyostelid细胞粘液霉菌（dictyostelids）是重要的土壤微生物，主要以土壤和枯枝落叶层中的细菌为食。俄罗斯远东地区是俄罗斯的最东端，因此位于西伯利亚的中东地区。2018年9月，从俄罗斯远东地区最东南的部分（包括萨哈林岛，乌苏里斯克和符拉迪沃斯托克）采集了14种土壤/腐殖质的混合样本，然后进行了处理。回收了四个属中的七个物种。这些物种的四个（Cavenderia束状，Heterostelium细叶，粘菌longosporum和Polysphondylium patagonicum）录首次从俄罗斯，一个物种（^ h。多臂藻 在本文中描述为科学新手。