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題 名 | 翠椿象(Anaca fasciata (Distant, 1900))(半翅目:蝽科)卵與若蟲的形態描述與發育觀察=Morphology and Development of Eggs and Nymphs of Anaca fasciata (Distant, 1900) (Hemiptera: Pentatomidae) |
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作 者 | 鹿兒陽; | 書刊名 | 臺灣昆蟲 |
卷 期 | 42:1 2022.02[民111.02] |
頁 次 | 頁25-39 |
分類號 | 387.764 |
關鍵詞 | 卵; 形態; 若蟲; 翠椿象; 發育; Anaca fasciata; Development; Egg; Morphology; Nymph; |
語 文 | 中文(Chinese) |
中文摘要 | 翠椿象 (Anaca fasciata (Distant, 1900)) 是台灣常見的椿象之一,其成蟲翠綠,頭部白色,前胸背板側角尖長,前胸背板前半部有一條白色或淡粉色橫帶,中胸小楯片末端具白色圓斑,因此極易辨認,但各齡若蟲形態差異頗大,難以與成蟲的身分連結。本研究在台北近郊仙跡岩的瑪瑙珠(Solanum diphyllum L.) 上採回二雌、一雄,共三隻成蟲放入同一個養蟲箱中飼養,取得雌蟲 (兩隻或其中之一) 產下的三個卵塊,孵化之若蟲以野外食草瑪瑙珠飼養,除描述各發育期形態特徵外,並比較三個卵塊孵化後若蟲至成蟲之發育過程。每個卵塊有14 顆卵,第一個卵塊只有12 顆卵孵化,而若蟲發育至成蟲之成功率僅有50%,後兩個卵塊則全數孵化,若蟲分別有86%、71%成功發育為成蟲。第一個卵塊自卵到成蟲所需的發育時間平均為45.5 日,明顯較第二、三個卵塊 (分別為50.0、52.3 日) 為短;第一個卵塊發現日期也許比實際產卵時間要晚,因此低估了卵化所需時間。雄成蟲羽化較早,雌成蟲體型較大。一齡若蟲大致暗紅褐色或黑色;二齡頭、胸仍大致為黑色,但腹部為白、黃兩色,成明顯對比;三齡腹部與二齡相似,但頭、胸白底上具有大型黑斑;四齡的顏色、斑紋與三齡相似,但中胸翅芽已發育蓋過後胸後緣;五齡中胸翅芽則發育至腹部第三節,此外可分為兩色型,深色型與四齡相似,在頭、胸具大型黑斑,淺色型則黑斑縮小且顏色較淡。 |
英文摘要 | Anaca fasciata (Distant, 1900) is a species of stink bug that is fairly common in Taiwan. An adult of this species can be easily identified on the basis of its green body, white head, pronotal spinose humeral angles, pale transverse band across the anterior part of the pronotum and white macula at the apex of the scutellum. However, associating nymphs and adults of this species is difficult because of great morphological variations among nymphs of different instars. In the present study, one male and two female adult A. fasciata were collected from the twoleaf nightshade (Solanum diphyllum L.) on Xianjiyan, a small hill in the suburbs of Taipei, Taiwan. The individuals were reared in a container, and several days later the female(s) (one of the two or both) laid three egg masses. The nymphs were reared in a laboratory and were fed with fresh twoleaf nightshade until they grew into the adults. The developmental rates of the three egg masses, each of which consisted of 14 eggs, were compared. Only 12 eggs in the first egg mass hatched, whereas all 14 eggs in the second and third masses hatched. Six of the 12 nymphs that hatched from the first egg mass developed into adults, corresponding to a 50% success rate. By contrast, the success rates in the second and third masses were 86% and 71%, respectively. The first egg mass developed into adults after an average of 45.5 days; the second and third egg masses developed into adults after an average of 50.0 and 52.3 days, respectively. Because the first egg mass might have been laid earlier but gone unnoticed, the number of days of incubation required before hatching may have been underestimated. The male individuals developed into adults earlier than did most of the female individuals, and the female adults were larger than the male adults. As the nymphs grew into adults, the changes in morphological characteristics were examined. The first-instar A. fasciata nymphs were dark reddish brown or black; the second-instar nymphs were mostly black except for their abdomens, which were distinctively lighter (white medially and with yellow margins); the third-instar nymphs had abdomens similar to those of the second-instar nymphs and had white heads and thoraces with large, black maculae; and the fourth-instar nymphs had coloration and maculae similar to those of the third-instar nymphs but had mesonotal wing-pads that had developed to cover the posterior ends of the metanota. When the A. fasciata nymphs reached the fifth instar, their mesonotal and metanotal wingpads had developed to reach their third abdominal segments. In the present study, two morphological types of fifth-instar nymphs, which differed in coloration, were identified: individuals of the dark morph has the large, black maculae on their heads and thoraces similar to those of the fourth instar, while light morph has diminished maculae which are paler. |
本系統中英文摘要資訊取自各篇刊載內容。