<国立科博専報>北海道のグンバイムシ(異翅半翅目)

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Fifteen tingid species are recognized in Hokkaido, Japan. Of these, Cysteochila fieberi is newly recorded, and Agramma nexile, Stephanitis watanabei an d Physatocheila veteris are rediscovered after their original descriptions. Host-plants are also noted for several species, that is, a gramineous weed for Agramma nexile, Syringa reticulata for Leptoypha capitata, Artemisia montana for Tingis lasiocera, and Rhododendron brachycarpum for Stephanitis watanabei. The tingid fauna of Hokkaido is notably poor as compared with those of the other regions of Japan, as shown in Table 1 and Fig. 1. It is, however, characterized by seven species (five of them are endemic to Japan) whose ranges in Japan are limited within Hokkaido. Only 4 of the 15 species are widely distributed from Hokkaido to Kyushu and none of them occur in common between Hokkaido and the Ryukyus. These facts suggest that the tingid fauna of Hokkaido mainly consists of northern Palearctic elements. On the other hand, 27 species or about 40% of the Japanese tingids, including such very common ones as Stephanitis nashi, S. takeyai, S. pyrioides, do not extend their ranges to Hokkaido beyond the Tsugaru Straits, though these are widespread from Kyushu or the Ryukyus to Honshu. Many of them seem to be of southern Palearctic or Himalayan-Chinese origins. It is probable that the Tsugaru Straits may have played a role of impassable barrier to the northward dispersal of these species of southern origin.
1987-12-01

<国立科博専報>北海道のグンバイムシ(異翅半翅目)

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