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Fine Structural Analysis of the Attachment Devices in the Jumping Spider Plexippus setipes  

Moon, Myung-Jin (Department of Biological Sciences & Institute of Basic Sciences, Dankook University)
Park, Jong-Gu (Department of Biological Sciences & Institute of Basic Sciences, Dankook University)
Publication Information
Applied Microscopy / v.39, no.2, 2009 , pp. 149-156 More about this Journal
Abstract
Fine structure of the dry adhesion system in the tarsal appendages of the jumping spider Plexippus setipes (Araneae: Salticidae) with examined using field emission scanning electron microscope (FESEM). The jumping spiders have the distinctive attachment apparatus for adhesion on smooth dry surface without sticky fluids. They attach to rough substrates using tarsal claws, however attachment on smooth surfaces is achieved by means of a tuft-like hair called a scopula. All eight legs have the scopulae with a pair of claws on the tip of feet, and each scopula is composed of two groups of setae that are capable of dry adhesion on smooth surface. The apex of each seta is flattened pad bearing many specialized adhesive setules on one side. The cuticular sensillae are interspersed at the dorsal surface of the seta. It has been revealed by this research that the contact area of the setule is always a triangular shape, and these cuticular surfaces are connected by the elongated stalks from the underlying setae. Moreover, adhesion between the numerous setules and the setae was prevented by the microscopic hairs, since these were interspersed on the upper side of the setae.
Keywords
Attachment device; Fine structure; Jumping spider; Scopula; Seta; Setule;
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