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Structure of Raster in Melolonthine Larvae

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Cribb, B.W., Hull, C.D., Moore, C.J., Miller, L.J. and Yeates, D.K. (1998) Structure of Raster in Melolonthine Larvae. Annals of the Entomological Society of America, 91 (2). pp. 202-210.

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Publisher URL: http://www.entsoc.org/pubs/periodicals/ann/index.htm


Ultrastructural and electrophysiological investigations carried out on larval rasters of Rhopaea magnicomis Blackburn, Lepidiota frerzclzi Black, and Antitr-ogus consanguineus Blackburn revealed that the raster is a complex of mechanoreceptive setae. Chemical and morphological investigations provide no evidence that the raster is a site for chemical emissions; however, species differences in hydrocarbon profiles were found among larval cuticle samples. Ultrastructure of the setae (pali) show that each seta is innervated by a single dendrite which ends in a tubular body at the base of the seta. The connection with the seta is on the proximal side, which corresponds to the production of a phasic-tonic electrophysiological signal on downward deflection. The dendrite is surrounded by a granular, electron-dense sheath which has inwardly directed arms distally and outwardly directed arms proximally. Two sheath cells are present, 1 forming a large receptor lymph cavity which is lamellate and lined with electron-dense material.

Item Type:Article
Additional Information:© Entomological Society of America.
Keywords:Antitrogus spp.; Rhopaea magnicornis; Lepidiota frenclzi; mechanoreceptor; cuticular hydrocarbons.
Subjects:Science > Zoology > Invertebrates > Insects
Live Archive:17 Jan 2006
Last Modified:03 Sep 2021 16:47

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