<国立科博専報>対馬産異翅半翅類(1)カメムシ型類
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概要
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The pentatomomorphous Heteroptera of Tsushima are dealt with in the present article, in which are listed 105 species under 82 genera. No endemic genera or species are found among them. From the distributional pattern of pentatomomorphous genera of the four areas, the Korean Peninsula, Quelpart Island, Tsushima and Kyushu Proper, the Tsushima fauna is proved to be composed primarily of the Kyushu elements and secondarily of the peninsular or continental ones. The fauna of Kyushu includes many southern elements and greatly affects to that of Tsuhsima possibly because of the shorter distance. The latter shows the dependence degree of 75.6% on that of Peninsular Korea and 98.9% on that of Kyushu Proper. Of the nine East Asiatic genera (seven of which are restricted to the Japan Sea coasts), Aenaria and Yemma are seen east of the Korea Straits, Acrocorisellus and Okeanos west of the straits, and Prosomoeus east of the Cheju Straits. Of the four remaining genera (common to both the Korean Peninsula and Kyushu), the two, Iodinus and Togo, are found in the Tsushima Islands. This means that the Korea Straits form an important barrier for the distribution of Pentatomomorpha but the Tsushima Straits do not. Some southern elements spread over Japan and Korea. Of the three distinctive genera, Dalpada, Placosternum and Anoplocnemis, known from Korea but not from Japan, the first genus is found in Quelpart Island and the second in the Tsushima Islands, but the third is restricted to the peninsular area. There are more genera of southern elements found east of the Cheju Straits, the Korea Straits and the Tsushima Straits respectively. Each of these straits acts as a barrier for dispersal and the Korea Straits may be more effective than the others. The distribution at species level also shows the presence of barriers between Quelpart Island and Tsushima (Carbula putoni, C. humerigera, Arma tubercula and Tropidothorax hanseni), Tsushima and Kyushu Proper (Pentatoma semiannulata), and the Korean Peninsula and Quelpart Island. Infraspecific variation in some Pentatomomorpha of Tsushima is also considered. The present material indicates that Tsushima plays a role as a step in distribution from the continent to Kyushu (and also Japan) and at the same time forms a bridge from Kyushu over the Tsushima Straits. The present pentatomomorphous fauna of Tsushima almost entirely depends on the fauna of Kyushu Proper (except for a single continental genus and three continental species belonging to three different genera).
- 国立科学博物館の論文