Dziani Dzaha is a hypersaline lake (Mayotte island), whose microbial community is dominated by photosynthetic microorganisms. Here, we describe two new free-living heteroloboseans. One belonging to the Pharyngomonas genus and the other, whose 18S rRNA gene sequence shares only 85% homology to its closest relatives Euplaesiobystra hypersalinica, was proposed as a new species of this genus being called Euplaesiobystra dzianiensis. Both strains were salt tolerant to 75‰ and grew between 25 and 37 °C. Their distribution patterns varied seasonally and depended also on depth. Noticeably, both free-living amoebae isolates were able to graze on Arthrospira filaments, which are found within the same water layer. In conclusion, we document for the first time the presence and ecology of free-living amoebae in the thalassohaline lake Dziani Dzaha, and describe a new species of the Euplaesiobystra genus.

Dziani Dzaha是高盐湖（马约特岛），其微生物群落主要由光合微生物控制。在这里，我们描述了两个新的自由生活的异族人。一种属于咽类，另一种属于其新近物种，其18S rRNA基因序列与其最接近的近亲Euplaesiobystra hypersalinica仅具有85％的同源性，被称为该类的新物种。两种菌株均耐盐75‰，并在25至37°C之间生长。它们的分布模式随季节变化，并且还取决于深度。值得注意的是，这两个自由生活的阿米巴虫株能够上吃草节旋在同一水层中发现的细丝。总之，我们首次记录了海藻盐湖Dziani Dzaha中自由生存的变形虫的存在和生态，并描述了Euplaesiobystra属的新物种。