Antennal sensilla of Xylotrechus rusticus and their distribution
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Key Words：Cerambycidea, Xylotrechus rusticus， grey tiger longicorn， antennal sensilla， ultrastructure
Abstract：The structure, number and distribution of antennal sensilla of the grey tiger longicorn(Xylotrechus rusticus) were observed with scanning electron microscope. The basiconica sensilla Ⅴ,Ⅲ,Ⅶ and Ⅷ, chaetica sensilla Ⅱ and Ⅲ, sensilla ensiform Ⅱ, dentiform sensilla and the wall pore beared chaetica sensilla were reported. Besides, other 3 special sensilla were found. The number of chaetica sensilla Ⅳ, basiconica sensilla Ⅰ and chaetica sensilla Ⅱ was 95 percent of all the sensilla number. The potential functions of sensilla were discussed on the basis of its distribution, shape character as well as the related references. The antennae of male and female adult were of sexually dimorphic difference: (1) the body size of males was shorter than that of females, but the antennae was longer at an average of 07 mm than that of females; (2) the distribution pattern of the same type sensilla was different in two sexes; (3) the number of the same type sensilla was also different in males and females; (4) the conformation of same sensilla differed in different sexes.