YPONOMEUTID MOTHS (LEPIDOPTERA: YPONOMEUTIDAE) OF ISLANDS OF THE PETER THE GREAT GULF: COMPARATIVE FAUNISTIC AND CHOROLOGICAL ANALYSES

The moths from the family Yponomeutidae on the four islands of the Peter the Great Gulf (Askold, Rikord, Bolshoy Pelis and Furugelm) are studied. 18 species from 5 genera of yponomeutids were recorded on the islands, which is more than half of the known species from the mainland of Primorskii Krai. The largest diversity at the generic level and a close to the maximum number of species were found in the fauna of the Askold Island (10 species from 5 genera), which is largest in area. The Furugelm Island, which is smallest in area, and has a more southern location, possesses richest fauna with 11 species. The fauna of yponomeutids on the Bolshoy Pelis Island is most original and poor, species list of which includes 4 species from 1 genus only, and 3 species of them were not found on any of the other studied islands. The Askold and Rikord Islands are most similar in species composition of yponomeutid moths (45%). The similarity of the faunas of Furugelm and Rikord Islands (42%) is higher than that between Furugelm and Askold Islands (40%). The core of the island fauna of yponomeutid moths are species with the East Asian range. The fauna of Askold Island, including 4 species groups with different types of ranges, turned out to be the most similar to the mainland of Primorskii Krai on the chorological structure. In general, the faunas of yponomeutid moths inhabiting the Islands of Peter the Great Gulf are characterised by the absence of endemism, impoverishment and disharmony of taxonomic diversity, as well as by the random replenishment with mainland elements, which is reflected in the low similarity of the species lists of the islands.