岡山県のショウジョウバエ調査3 : 岡山県中部におけるショウジョウバエ附:日本産オオショウジョウバエ種群の検索

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The collection of the Drosophilid flies in the central area of Okayama prefecture was carried out to investigate the Drosophila fauna in the period of Oct. 1988. Three stations were set. A total of 402 individuals, belonging to three subgenera and 22 species, was collected. Drosophila lutescens and D.lacertosa were the dominant species in the non-riverside and riverside, respectively. It was noted that two newly recorded taxa, D.quadrisettata and one unclassified taxon. D.quadrisettata, two females, was the first collection record except Hokkaido, the northmost of Japan. In relation to the unclassified taxon, collected one female and two males, we will describe as a new species, Drosophila ohbai, sp nov., the Japanese name "kawaookuro-shojobae" to the taxon. Drosophila albomicans, captured in the mainland of Japan firstly 1984,could be collected in this site It was thought from our collection data that recently invaded species, D.simulans and D.albomicans, effected on the dominancy of such as D.lutescens and D.immigrans which have been distributed in Japan before the invasion. The newly arranged key to classify the immigrans species group in Japan is presented as an appendix in this issue.
岡山理科大学の論文