New Records of Wood- and Bark-Inhabiting Nematodes from Woody Plants with a Description of sp. n. (Aphelenchoididae: Parasitaphelenchinae) from Russia.

Wood- and bark-inhabiting parasitic nematodes are of great economic importance. Nematodes can cause wilt diseases in conifers and deciduous trees. In 2014-2022, during nematology surveys conducted in different regions of Russia and Belarus, adults and dauer juveniles of nematodes were collected from wood, bark and beetle vectors. Using traditional morphological taxonomic characters integrated with molecular criteria, we identified in the studied samples the following nematode species: , , , , , , , and , several unidentified species: sp.1 and sp.2, sp.1, sp.2 and sp.3, sp.1, sp.1, sp.1, sp.1, three unidentified tylenchid nematodes and a new species, sp.n. Morphological descriptions and molecular characterization are provided for sp. n. belonging to the group and belonging to the group. Findings of , , , , and are new records for Russia. Phylogenetic positions of studied species were reconstructed using D2-D3 expansion segments of 28S rRNA gene sequence analysis. The data obtained in this study may help to detect the refugia of opportunistic plant pests and find possible native biocontrol nematode agents of insect vectors causing diseases.