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《Chinese Journal of Zoology》 2015-06
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Observation on the Hair Sensors of Pardosa pseudoannulata by Scanning Electron Microscopy

WANG Bo;HUANG Ting;LIU Jin;HUANG Xin-Yi;TAN Zhao-Jun;YAN Heng-Mei;Life Science College, Hunan Normal University;Beijing Normal University,Zhuhai Campus;  
Spider is sensitive to various stimuli. To understand spider′s sensing mechanism, the hair sensors(tactile hair, trichobothrium, gustatory hair) of Pardosa pseudoannulata were observed by scanning electron microscopy(SEM). The results indicated that tactile hair formed an acute angle with the surface of spider body. The base of tactile hair was surrounded by hair follicles. Tactile hair was big, thick, and straight, with villus around(Fig. 1). Most of tactile hairs distributed on the tarsus and tibia of appendages, especially on the first leg. The quantity of tactile hairs was more than that of trichobothria or gustatory hairs. There was obvious difference between trichobothrium and other hairs. The distinct character of trichobothrium was thin and long and mostly perpendicular to the epidermis; also, the hair follicle of trichobothrium was like a deep pit, with folds(Fig. 2). The result of scanning electron microscope observation indicated that less trichobothria fell off, and that the hair base and body might be firmly combined. Trichobothria were mainly distributed on the fourth leg and the pedipalps, while less was distributed on the rest of femur. Usually, the base of gustatory hair had a slight bulge around the round hair follicles, while there was a slight curve on the top of gustatory hair(Fig. 3). Gustatory hairs were mainly distributed on the first and second legs, and a few gustatory hairs were located in pedipalps and chelicera.
【Fund】: 国家自然科学基金项目(No.31172107);; 湖南省研究生科研创新项目(No.CX2014B198)
【CateGory Index】: Q954
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