八丈島のカメムシ目(昆虫綱)

概要

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Seventy-nine species of the Heteroptera in 19 families are recorded from Hachijo Island mostly on the basis of the material collected by the authors in 2001 as a part of a research project "the Natural History Researches of the Kanto Plain, Its Northern Mountains and Their Adjoining Areas" conducted by the National Science Museum, Tokyo. Hachijo Island is a volcanic island lying about 300 km south of Tokyo at the southernmost part of the Izu Islands. The Island receives more than 3000 mm of precipitation a year and the annual mean temperature is 18.3℃. Despite the favorable climatic condition, the heteropterous fauna of the Island is conspicuously poor, even though insufficiency of inventory surveys on the Heteroptera is taken into consideration. This volcanic island is still young in geologically and water system is, therefore, at an early stage of development. Accordingly, it cannot be inhabited by the most species of aquatic and semiaquatic heteropterans. Most probably due to the geological condition the flora of the Island is considerably poor. Consequently, specific diversity of the phytophagus Heteroptera still remains in low level.
2002-12-25