Observation of sensilla on the cephalic appendage of Apriona germari with scanning electron microscopy
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Key Words：Apriona germari， antenna， mandible palp， labial palp， sensilla
Abstract：The ultrastructure and distribution of sensilla on antenna, mandible palp and labial palp of Apriona germari (Hope) adult was observed with scanning electron microscope. The antennae contained six types of antennal sensilla, including sensilla trichodea, sensilla basiconica (including five subtypes: BⅠ～BⅤ), sensillacheatica (including two subtypes: CHⅠand CHⅡ), sensilla emmiformium, sensilla squamiformia and sensilla rod-like. Sensilla rodlike and cluster pattern of sensilla BⅠ were only found on the male antenna, and on the female antenna there were more sensilla BⅡ and sensilla BⅣ than those on male antenna, but fewer sensilla gemmiformium. Both mandible palp and labial palp contained five types of sensilla, including sensilla trichodea, sensilla cheatica, sensilla twig basiconca, sensilla campullacea, and sensilla aperture. The type, number and distribution of palp sensilla were similar in both sexes.