A study of evolutionary taxonomy of the japanese Mnais damselflies (Odonata, Calopterygidae)

目前的项目是在1986年至1987年期间完成的。到目前为止，得到了以下结果：1986年，我在北海道岛的20个地点对豆娘蝇进行了深入调查，并确定在岛上，豆娘蝇种群总是单独栖息（Suzuki, 1987b）。在1986年和1987年，我和我的合作者（H. Kadowaki先生）在岛根县约250个地方对这一群体进行了深入的调查，包括大木群岛（Suzuki & Kadowaki, 1986, 1987a, c）。在Oki群岛（Dogo岛）只有M. nawai Chugoku群人口居住。岛根县本区分布有M. nawai Chugoku群和M. pruinosa南开群。它们偶尔会在同一条河流中同时出现。在1986年和1987年，我在九州的许多地方，包括后藤岛和越木岛，对这个群体进行了深入的调查。九州地区主要分布有3种：1。M. nawai九州集团，2。3.南开群；M. pruinosa Saikai集团。它们中的两个偶尔会在同一流中同时出现。在后藤岛和越木岛分别发现了应视为独立亚种的独特种群。特别是，从日本群岛矮豆娘物种形成的角度来看，Koshiki种群是非常重要的。该种群的雄性和雌性组合形式显然与未描述的新种M. sp.相对应，它分布在本州中部（Suzuki, in preparation）。

The present project was made during 1986 to 1987. The following results have been obtained so far.1. In 1986, I made an intensive survey of Mnais damselflies at 20 localities of the Island of Hokkaido and ascertained that in the island M. costalis populations always inhabit alone (Suzuki, 1987b).2. In 1986 and 1987, I and my collaborator (Mr. H. Kadowaki) made an intensive survey of this group at about 250 localities of Shimane Prefecture including Oki Islands (Suzuki & Kadowaki, 1986, 1987a, c). In Oki Islands (Dogo Island) only M. nawai Chugoku group population inhabits. In Shimane Prefecture proper M. nawai Chugoku group and M. pruinosa Nankai group populations are distributed. They occasionally co-occur in the same stream.3. In 1986 and 1987, I made an intensive survey of this group at many localities of Kyushu including Goto Islands and Koshiki Islands. In Kyushu, the following three Mnais species are distributed: 1. M. nawai Kyushu group, 2. M. pruinosa Nankai group, and 3. M. pruinosa Saikai group. Two of them occasionaly co-occur in the same stream. From Goto and Koshiki Islands, unique populations, which should be treated as independent subspecies respectively, were discovered. In particular, the Koshiki population is very important from the viewpoint of speciation ofMnais damselflies in the Japanese Islands. The combination of male and female forms of the population apparently corresponds to the undescribed new species M. sp., which is distributed in central Honshu (Suzuki, in preparation).