筛胸梳爪叩甲触角感器的电镜扫描观察

利用扫描电镜观测筛胸梳爪叩甲成虫触角的感器类型、数量、形态及分布特征,比较雌雄之间的差异。结果表明:筛胸梳爪叩甲雌、雄成虫触角由1节柄节、1节梗节和9节鞭节3部分构成。雌成虫包括8类触角感器,即毛形感器、刺形感器、锥形感器、弯膝形感器、鱼钩形感器、钉帽形感器、圆形感器和Bhm氏鬃毛,其中毛形感器又分2种亚型,锥形感器分3种亚型。雄成虫除上述8类感器以外还分布有1类凹槽钉形感器。在筛胸梳爪叩甲成虫触角上分布较多的前3种感器依次是毛形感器Ⅱ、刺形感器、锥形感器;除凹槽钉形感器外,其他同类感器在雌、雄成虫触角上的数量及分布差异不显著。基于各感器的形态、数量及分布,对筛胸梳爪叩甲各触角感器功能进行了探讨。

Antennal Sensilla of the Click Beetle, Melanotus cribricollis (Coleoptera: Elateridae)

The typology, number, morphology and placement of antennal sensilla of click beetle (Melanotus cribricollis Faldermann) were studied using a scanning electron microscopy. The results showed that the antennae on both the males and females were composed of the scape, pedicel and nine flagellomeres. There were eight types of antennal sensilla on the antennae of the females, that is, sensilla trichodea (including two subtypes: TⅠand TⅡ), sensilla chaetica, sensilla basiconica (including three subtypes: BⅠ-BⅢ), sensilla knee-bend shaped, sensilla hook-shaped, sensilla screw cap, sensilla campaniformia and Bhm sensilla. The antennae of the male had one more type of grooved pegs besides the above-mentioned eight types. By vital statistics, the most sensilla numbers on the adult antennae in turn belonged to TⅡ, Ch and B, respectively. There were no significant differences in the total number and placement of antennal sensilla (except grooved pegs) on the female and male. The possible functions of the above sensilla types were discussed in light of the morphology, number and distribution of sensilla.