富山県におけるマツヘリカメムシの初記録

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  • First Record of Leptoglossus occidentalis Heidemann, 1910 (Coreidae, Hemiptera) in Toyama Prefecture, Central Japan

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Leptoglossus occidentalis Heidemann, 1910 was recorded from 32 sites in Toyama Prefecture. The first record in the prefecture was an individual confirmed in Toyama City in 2017. It was also confirmed from two sites at altitudes above 1,000 m in Arimine, Toyama City. This is a rare case in Japan. A comparison of the year of first record by municipality suggests that the invasion into the central and western parts of Toyama may have been slightly earlier than that into the eastern part of the prefecture. Additionally, the fact that there were scattered sites where the species was repeatedly confirmed at the same site suggests that the species has already become established in Toyama. Since the records in this paper were concentrated in fall, winter, and spring, it was considered that most of the individuals were found during migratory dispersal before and after overwintering.

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