Phytoseiid mites of the genus Neoseiulus (Parasitiformes, Phytoseiidae), N. brachychaetus Kolodochka, sp. n. and N. akimovi Kolodochka, sp. n. from Georgia and Russia are described. Re-examination of the holotypes of N. bicaudus (Wainstein, 1962) and N. micmac (Chant & Hansell, 1971) revealed new characters for diff erentiation between similar species were found and proposed. Th e name N. micmac (Chant & Hansell, 1971) restored from synonymy here. A key to species similar to Neoseoiulus bicaudus is given.
Structure of species complexes of predatory phytoseiid mites (Phytoseiidae) and their distribution were studied in plant associations of Uman’ town (Cherkasy Region, Ukraine). Twelve species of seven genera of phytoseiid mites were revealed. It was observed centripetal reduction of the species diversity in the phytoseiid complexes from the outlying districts to the center of the town.
Species Composition and Distribution of Oribatids (Acari, Oribatei) in Urbanized Biotopes of Kyiv. Shevchenko, O. S., Kolodochka, L. A. - Species composition and dominance structure of oribatid species complexes on chosen plots in urbanized biotopes of Kyiv are established. Species sensitivity to anthropogenic factors is discussed.
Distribution of two morphologically and ecologically related species of predatory phytoseiid mites of the genus Amblydromella (A. pirianykae and A. recki) in a zone of their natural intergradation (mountain ridge Donetsky Kriazh in the east of Ukraine) is studied for the first time. The list of plants populated by both predators is given. Consistent patterns of mite distribution on life forms of plants are determined biotopical fidelity on the basis of the coefficient. Very rarely, A. pirianykae and A. recki mites simultaneously populate the same plant organism (only 1.6 % of all samples) which can be attributed to the partially resolved antagonistic relationships. Th e basis of the antagonism is, in the first place, similarity of food preferences of the predators that, in principle, occupy the same ecological niche. Dramatic finale of this confrontation is the elimination of one of the species which has no distinct advantage in the specific conditions of a local microhabitat.
In different types of substrate (soil, litter, lichens and mosses) collected at three memorial complexes (cemeteries) of Kyiv (Ukraine), 70 species from 57 genera, 34 families of oribatid mites were found. A few eurytopic species capable of tolerance to different types of pollution make up an essential part in each species complex. The species diversity and complexity of oribatid community structure at researched areas increased with distance from the city center. There was no direct relation between the degree of dominance of most common species and the cemetery’s relative remoteness from the center of the city.
Species complexes of oribatid mites at six plots on the street lawns in one of Kyiv districts are studied. In total 27 species of 26 genera and 19 families of oribatid mites are found. Direct correlation between oribatid species diversity and the level of total soil pollution is not shown.
Species complexes of oribatid mites in soil and litter in 10 plots in green areas of different parts of Kyiv city in April-September 2011 were studied. In total, 107 species of 76 genera of 44 families of oribatids were found. Trends of seasonal fluctuations of species diversity and dominance structure of oribatids in studied plots were assessed.