Antennal Sensilla of Female Telenomus remus Observed with Scanning Electron Microscopy

Telenomus remus Nixon (Hymenoptera: Scelionidae) is an egg parasitoid of Noctuidae insects.The antennal sensory sensilla of female parasitoid were observed with scanning electron microscopy. Nine distinct types of sense receptors were observed, including sensillum basiconica, sensillum trichodea, sensillum trichodea curvata, sensillum styloconicum, sensillum campaniformium, fluted bent-tipped sensillum, pore-tipped ampullaceous sensillum, sensillum gemmiformium and sensillum chaeticum. Three forms of sensillum basiconica (SB) were found. SBⅠ were distributed at the end parts of scape that link the head and pedicel; SBⅢ were only found at the flagellum, and SBⅡ were always accompanied with the pore-tipped ampullaceous sensillum. Sensillum trichodea were distributed widely on the antenna with larger amount. However, the other seven sensilla were mainly distributed at the eighth to the eleventh fragments of antenna.