The Range, Transmitting Insects, and Mitochondrial DNA Polymorphism of Gamasid Mite Hoploseius oblongus (Mesostigmata, Blattisociidae), Obligate Mycobiont on Bracket Fungus Fomitopsis pinicola (Polyporales, Basidiomycota)статья
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Аннотация:The genetic diversity of gamasid mite, Hoploseius oblongus Masan & Halliday, 2016, found in France, Denmark, Ukraine, and widely spread in Russia (from the Caucasus to the Arctic), is characterized. This species, known so far from the six finds in Slovakia and Poland, lives only in the hymenophore of living fruiting bodies of the bracket fungus Fomitopsis pinicola. A total of 502 living F. pinicola fruiting bodies from 62 localities were studied, and DNA barcoding of H. oblongus individuals from 28 localities in Europe, the Caucasus, and Western and Central Siberia was performed. At least 90% of the fruiting bodies of F. pinicola in the studied regions were inhabited by the H. oblongus mite. The association of F. pinicola with the H. oblongus mite was observed throughout the Western Palearctic, up to the Yenisei River valley in the east. Throughout the territory of the extensive range examined, H. oblongus is characterized by the low sequence variation of the mitochondrial COI gene BOLD fragment and is monomorphic in the nucleotide sequence of nuclear ribosomal repeat fragment. Low genetic diversity points to the relatively recent origin of the population of H. oblongus, possibly associated with the restoration of the forest belt of Northern Eurasia in the Holocene. The efficiency of H. oblongus dispersal is ensured by the phoresy of adult mites on ovipositing females of dark-winged fungus gnats (Sciaridae) in late summer and early autumn. More rarely, mites disperse on adult gall midges (Cecidomyiidae) from the tribe Brachineurini or on adults of some other small insect species from the order Diptera.