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Structure and ultrastructure of the silk glands and spinneret of Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae)

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Sorensen, G.S., Cribb, B.W., Merritt, D., Johnson, M.-L. and Zalucki, M.P. (2006) Structure and ultrastructure of the silk glands and spinneret of Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae). Arthropod Structure and Development, 35 (1). pp. 3-13.

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Article Link: http://dx.doi.org/10.1016/j.asd.2005.10.002

Publisher URL: http://www.elsevier.com


This study provides comprehensive documentation of silk production in the pest moth Helicoverpa armigera from gland secretion to extrusion of silk thread. The structure of the silk glands, accessory structures and extrusion apparatus are reported. The general schema of the paired silk glands follows that found for Lepidoptera. Morphology of the duct, silk press, muscle attachments and spigot are presented as a three-dimensional reconstruction and the cuticular crescent-shaped profile of the silk press is demonstrated in both open and closed forms with attendant muscle blocks, allowing advances in our knowledge of how the silk press functions to regulate the extrusion of silk. Growth of the spigot across instars is documented showing a distinctive developmental pattern for this extrusion device. Its shape and structure are related to use and load-bearing activity.

Item Type:Article
Additional Information:© Elsevier Ltd.
Keywords:Cotton bollworm; cuticle; insect; integument; silk press; spigot.
Subjects:Science > Zoology > Invertebrates > Insects
Science > Zoology > Morphology
Live Archive:25 Feb 2009 01:39
Last Modified:03 Sep 2021 16:47

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