Abstract
Overall results of several spider mite surveys performed in the Black Sea Biosphere Reserve (Ukraine) during the 1990s to 2015 are presented. A total of 20 species were found, belonging to 11 genera, from 58 different host plant species, of which one mite genus, Mesobryobia (Wainstein, 1956), and three species, M. terpoghossiani (Bagdasarian, 1959), Georgiobia richteri (Bagdasarian, 1954) and Tetranychus lonicerae Beglyarov & Mitrofanov, 1973, are new mite records to the Ukrainian acarofauna. Moreover, 15 new host plant species were also recorded as new hosts for 10 spider mite species. In addition, thanks to the newly collected material and a taxonomical historical review, and according to morphological data, we restore the genus Georgiobia Wainstein, 1960, and provide a new diagnosis of this genus. Therefore, a list of several new and reinstated combinations is provided. Finally, a new species, G skuthiae n. sp., collected in the reserve on Agropyron sp., is described and illustrated, increasing the number of species that belong to the genus Georgiobia to nine.