红缘天牛嗅觉感受器的类型及特点

The type and characteristic of olfaction sensilla in Asias halodendri

利用扫描电镜对红缘天牛Asias halodendri(Pallas)的触角、下颚须和下唇须上嗅觉感受器的类型、超微形态结构及分布等特点进行观察。结果表明,红缘天牛触角、下颚须和下唇须上的嗅觉感器共有6类14种。触角上感器共有2类9种,即毛形感器1种,锥形感器8种;触角上毛形感器和Ⅱ型锥形感器长度在雌雄间有显著性差异;Ⅲ型、Ⅶ型和Ⅷ型锥形感器为雌性触角上所特有;Ⅵ型锥形感器仅见于雄性触角;触角上的感受器总数雌性数量多于雄性,背面略多于腹面和侧面。下颚须及下唇须上嗅感器共4类5种,即栓锥形感器2种、板形感器、钟形感器和边缘凹槽形感器各1种;雌性的边缘凹槽形感器明显高于雄性;下颚须和下唇须上雄性感器总数较多,腹面数量多于背面。

The type,ultrastructure and distribution of the olfactory sensilla of the antenna,maxillary palpus and labial palpus of Asias halodendri （Pallas） （Coleoptora：Cerambycidae） were observed with a scanning electron microscope.The results indicate that there are six types and fourteen kinds of sensilla on these three body parts.The antenna has one kind of sensilla trichodea and eight kinds of sensilla basiconicas.There are significant differences between males and females in the length of the sensilla trichodea and sensilla basiconica Ⅱ.Basiconica Ⅲ,basiconica Ⅶ and basiconica Ⅷ are peculiar to females but basiconica Ⅵ is only found in males.The total number of sensilla is greater in females than males,and these are more common on the dorsal than on ventral and lateral surfaces.There are four types and five kinds of sensilla on the maxillary and labial palpus,including two kinds of sensilla styloconica,one kind of sensilla placodea,one kind of sensilla campaniformia and one kind of sensilla eage groove.The sensilla eage groove of females is higher than that of males and males have more ventral than dorsal sensilla.