Zhou H, Wu W J, Zhang F P, Fu Y G
Lab of Insect Ecology, South China Agricultural Univ, Guangzhou 510642, China.
Neotrop Entomol. 2013 Jun;42(3):278-87. doi: 10.1007/s13744-013-0113-9. Epub 2013 Feb 27.
Metaphycus parasaissetiae Zhang & Huang (Hymenoptera: Encyrtidae) is an important adult parasitoid of Parasaissetia nigra Nietner (Hemiptera: Coccoidea). The external morphology of the antennal sensilla of male and female M. parasaissetiae was examined using scanning electron microscopy. The geniculate antennae of male and female M. parasaissetiae were composed of a scape with a basal radicula, a barrel-shaped pedicel, and a long flagellum. Twelve morphologically distinct types of sensilla were identified, including multiporous placoid sensilla, campaniform sensilla, finger-like sensilla, multiporous basiconic sensilla (BS-1), three aporous types of basiconic sensilla (BS-2, BS-3, and BS-4), two types of aporous trichoid sensilla (TS-1 and TS-3), a type of multiporous trichoid sensilla (TS-2), and two types of sensilla chaetica (CH-1 and CH-2). Sex dimorphism in the sensilla composition of M. parasaissetiae is also observed. Major differences between the sexes were found in the number, distribution, shape, structure, and size of the identified sensilla. We also discuss on the functional aspects of these sensilla to elucidate the mechanisms involved in host searching and courtship behavior of M. parasaissetiae.
扶桑绵粉蚧桨角蚜小蜂Zhang & Huang（膜翅目：跳小蜂科）是黑褐圆盾蚧Nietner（半翅目：蚧总科）的一种重要成虫寄生蜂。利用扫描电子显微镜对扶桑绵粉蚧桨角蚜小蜂雌、雄触角感器的外部形态进行了观察。扶桑绵粉蚧桨角蚜小蜂雌、雄膝状触角均由具基部根节的柄节、桶状梗节和长鞭节组成。共鉴定出12种形态不同的感器类型，包括多孔板状感器、钟形感器、指状感器、多孔锥形感器（BS-1）、3种无孔锥形感器（BS-2、BS-3和BS-4）、2种无孔毛形感器（TS-1和TS-3）、1种多孔毛形感器（TS-2）和2种刺形感器（CH-1和CH-2）。还观察到扶桑绵粉蚧桨角蚜小蜂感器组成的两性异形现象。在已鉴定感器的数量、分布、形状、结构和大小方面发现了两性之间的主要差异。我们还讨论了这些感器的功能方面，以阐明扶桑绵粉蚧桨角蚜小蜂寄主搜索和求偶行为所涉及的机制。
