Bulletin of the Hiroshima University Museum Issue 13
2021-12-25 発行

東広島市におけるコガタノゲンゴロウ Cybister tripunctatus lateralis(Fabricius, 1798)の飛来地と定着に関する一考察

A consideration on the landing site and settlement of Cybister tripunctatus lateralis (Fabricius, 1798) in Higashi-Hiroshima City
NANBA, Renshiro
SHIMIZU, Yuki
TANI, Shotaro
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abstract
In 2019, one of the authors collected one female Cybister tripunctatus lateralis (Fabricius, 1798) along with other species of diving beetles in a wetland behind a paddy field in Fukutomi Town, Higashi-Hiroshima City. This is the second record of this species in this city. It is a relatively large aquatic beetle that inhabits ponds and has abandoned paddy fields rich in aquatic plants, from flatlands to low mountains. It was recorded in various places until around 1950, with one record of the species in Kurosechootada, Higashi-Hiroshima City on November 9, 1919 (Kameyama and Sugimori, 2020), but has decreased sharply since then. However, in recent years, sightings have increased all over the country, mainly in western Japan, and since there are a series of sightings in Higashi-Hiroshima other than this report, it is suggested that the population of this species is recovering and the distribution is expanding in Higashi-Hiroshima, similar to the other parts of the country. In the future, continuous sightings of this species in the wetlands of Higashi-Hiroshima City are expected.
subject
コガタノゲンゴロウ
東広島市
RDB
個体数の増加
湿地帯
Cybister tripunctatus lateralis
Higashi-Hiroshima City
Population increase
wetlands
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