菜蛾
菜蛾科
生物
伊蚊
生殖器鳞翅目
精囊
小菜蛾
解剖
人口
动物
植物
分类学(生物学)
社会学
人口学
精子
作者
Kristine A. Justus,B. K. Mitchell
出处
期刊:International Journal of Insect Morphology & Embryology
[Elsevier]
日期:1999-07-01
卷期号:28 (3): 233-246
被引量:12
标识
DOI:10.1016/s0020-7322(99)00027-6
摘要
Copulatory mechanisms and internal reproductive systems of male and female Plutella xylostella (L.) were investigated. Both male and female specimens exhibited characteristics typical of ditrysian Lepidoptera, with some peculiarities. Female structures appear to be relatively simple: the bursa copulatrix lacks cuticular signa within, the spermatheca lacks lagenar arms exhibited in some Lepidoptera, and colleterial glands have secretory system and reservoir combined. Male accessory gland ducts are joined distally, a condition that has not been described in other Lepidoptera. Genitalia of both sexes appear simple; females possess a posterior cuticular extension of abdominal sternites that houses the bursal duct and accomodates the needle-like aedeagus of a male during copulation. Despite the apparent simplicity, configuration of genitalia is highly specific in shape, angle, and size, which is likely to be important in maintaining reproductive isolation within the species. However, a population of P. xylostella from Australia showed some modification to both aedeagal and bursal structures. These variations suggest some important implications for considering species with worldwide distributions.
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