The nidicolic group of gamase mites on the territory of Eastern Transbaikalia and their biocoenotic relationships

This paper summarizes the results of studies on the fauna of gamas mites of the nidicolic group. On the Eastern Transbaikal Territory, 68 species have been identified as part of the nidicolic group. They belong to nine families, most of them have been found in rodent nests. The largest number of species belongs to the families Parasitidae, Laelaptidae, Rhodacaridae. Many species have been found in the soil, where they form micropopulations. Of the 68 species 19 have not been found in the soil: six species of Euryparasitus, three species from the genera Poecilochirus, Ameroseius, Macrocheles, one species – Parasitus (Coleogamasus) tichomirovi, Veigaia beklemischevi, Pachylaelaps siculus, Hypoaspis krameri. In the biocoenosis of the vegetable storage, H. timofejevi have had the highest rates, its reproduction and development have taken place here. We have detected all stages of development. The main parts of the population have been represented as follows: females – 48%, males – 11,8%, larvae – 1,2%, protonymphs – 7%, deutonymphs – 32%. Females in each hamazid population numerically have predominated over males. Drawings of the preimaginal stages of development as well as its topical and phoric connections have been described. The nidicoles of the forest-steppe zone of Transbaikalia have demonstrated a tendency to synanthropization. The tendency has been noted in 21 species of nidicoles from six families: eight from the family Parasitidae, five from the family Laeleptidae, three from the family Macrochelidae, two species from the family Ameroseidae, Aceosejidae and one species from the family Rhodacaridae. Interspecific relationships have been established for H. timofejevi, E. emarginatus.