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((short description|Hard, sharp, anatomical structure found in some invertebrates))
((other uses|Stylet (disambiguation)))
((Refimprove|date=November 2013))
[[File:Kalyptorhynch stylet.png|thumb|Stylet of a [[Kalyptorhynchia|kalyptorhynch]] flatworm]]
A '''stylet''' is a hard, sharp, anatomical structure found in some [[invertebrate]]s.
For example, the word ''stylet'' or '''stomatostyle''' is used for the primitive piercing mouthparts of some [[nematode]]s<ref>((cite web|title=Digestive System|url=http://plpnemweb.ucdavis.edu/nemaplex/General/Anatomy/digestive.htm|work=Nemaplex- The Nematode-Plant Expert Information System|publisher=Department of Nematology, University of California, Davis|accessdate=26 November 2013))</ref>  and some [[nemertea]]ns. 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 function by providing the operative organism with access to the nutrients contained within the prey cell.

The mouthparts of [[tardigrade]]s, [[diptera]] and [[aphid]]s<ref>((citation |chapter=Plant viruses |author=W. Allen Miller |author2=Steven A. Whitham |page=2311 |title=[[Fields Virology]] |edition=6th |year=2013 |editor1= David M. Knipe |editor2=Peter Howley |publisher= Wolters Kluwer |ISBN=9781451105636))</ref> are also called stylets.<ref>((cite web|url=http://www.biology.ualberta.ca/mitchell.hp/Structure/modules.pdf|format=PDF|title=An Introduction to Insect Structure|website=Biology.ualberta.ca|accessdate=10 July 2018))</ref>

In [[octopus|octopodes]], the stylets are internal, needle-like bent rods within the mantle, the vestigial remnants of an external shell.<ref>((cite journal |last1=Lourenço |first1=Sílvia |last2=Moreno |first2=Ana |last3=Narciso |first3=Luís |last4=Pereira |first4=João |last5=Rosa |first5=Rui |last6=González |first6=Ángel F. |title=Stylet (vestigial shell) size in Octopus vulgaris (Cephalopoda) hatchlings used to determine stylet nucleus in adults |journal=Journal of the Marine Biological Association of the United Kingdom |date=September 2015 |volume=95 |issue=6 |pages=1237–1243 |doi=10.1017/S0025315415000478 |hdl=10261/124380|hdl-access=free ))</ref>

==References==
((Reflist))

((wiktionary|stylet))

[[Category:Nematode anatomy]]


((Animal-anatomy-stub))

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