Stylet (anatomy)

A stylet is a hard, sharp, anatomical structure found in some invertebrates. For example, the word stylet or stomatostyle is used for the primitive piercing mouthparts of some nematodes[1] and some nemerteans. In these groups the stylet is a hardened protrusible opening to the stomach. These stylets are adapted for the piercing of cell walls, and usually functions by providing the operative organism with access to the nutrients contained within the prey cell.

The mouthparts of tardigrades, diptera and aphids[2] are also called stylets.[3]

In octopuses, the stylets are internal, needle-like bent rods within the mantle, the vestigial remnants of an external shell.[4]

References
  1. "Digestive System". Nemaplex- The Nematode-Plant Expert Information System. Department of Nematology, University of California, Davis. Retrieved 26 November 2013.
  2. W. Allen Miller, Steven A. Whitham (2013), "Plant viruses", in David M. Knipe, Peter Howley (eds) (eds.), Fields Virology (6th ed.), Wolters Kluwer, p. 2311, ISBN 9781451105636CS1 maint: uses editors parameter (link)
  3. "An Introduction to Insect Structure" (PDF). Biology.ualberta.ca. Retrieved 10 July 2018.
  4. "Stylet Size in *Octopus vulgaris* Hatchlings" (PDF). http://digital.csic.es/. Retrieved 17 November 2018. External link in |website= (help)


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