This insect belongs to the family Drosophilidae, suborder Brachyceratopsid, subfamily Drosophilidae, class Insecta. Insects of this family have a yellowish-brown body and wing length of 2-2.5 mm. The compound eyes of wild species are red when alive, so they are also called Akame. The antennae are short, but the antennal setae are long and feathery, with five branches on the back and three on the bottom. The dorsal surface of the thorax is slightly glossy and has many short, black fine hairs. The wings are transparent and have no markings. At the end of the first tarsal segment of the forelegs, males have a sex comb consisting of about 10 black bristles. At the rear edge of each dorsal segment of the abdomen, there is a black-brown horizontal band, which becomes wider the further back the segment is. Adults gather on fermented materials such as overripe fruits, rice bran miso, and alcoholic beverages, and the larvae grow by feeding on yeast. They are often found near houses and breweries. It is easy to breed, and if the environmental conditions are good, it is possible to breed it for 25 to 30 generations per year. It has only eight chromosomes, and giant salivary gland chromosomes can be seen. In addition, it has a remarkable expression of various traits, so it is used as a good material for research and learning in genetics. [Shushiro Ito] [References] |©Tatsuo Ikeda ©Kenzo Otawa ©Kei Daishoji "> Major types of flies (3) Buccal group - wingless… Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
昆虫綱双翅(そうし)目短角亜目ハエ群ショウジョウバエ科に属する昆虫。この科の昆虫は、体長、翅長とも2~2.5ミリメートルで、体は黄褐色。野生種の複眼は、生時は赤色なので、アカメともよばれる。触角は短いが、触角刺毛は長い羽毛状で、背方には5本、下方には3本の分枝がある。胸部背面にはやや光沢があり、黒色の短い微毛が多い。はねは透明で斑紋(はんもん)はない。前脚第1跗節(ふせつ)の末端には、雄では約10個の黒色の剛毛よりなる性櫛(せいしつ)をもつ。腹部背面各節の後縁には黒褐色の横帯があり、その幅は後方の節のものほど太くなる。成虫は過熟の果物、ぬかみそ、酒類などの発酵物に集まり、幼虫は酵母菌を食べて生育する。人家の付近や醸造工場の付近に多い。飼育が簡単で、環境条件がよければ年間に25~30回もの累代飼育が可能である。染色体数が8個と少なく、巨大な唾液腺(だえきせん)染色体もみられるほか、諸種の形質の発現が顕著であるため、遺伝学の研究や学習の好材料として用いられている。 [伊藤修四郎] [参照項目] |©池田達夫 ©大多和鐘三 ©大聖寺慶"> ハエのおもな種類(3)有額嚢群―無弁翅… 出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
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