environment in conditions of Transbaikalia enables us to understand more deeply modern nature, and that nature we will live. It is possible, that the knowledge of some adaptive features of organisms will be vital nessesary to people in constantly changing environment.
Here, we will try to show only small part of a rich group of animals that lives in our region. In our days about 500 zoobenthic species of Transbaikalia's water bodies are known, however each new collecting brings us species unknown not only in Transbaikalia, but also, maybe, nowhere.