Linked from
The 7 pages that link to Stylet, each with the reason it gives.
HeteropteraRelated: Paired stylets form the piercing elements inside a true bug’s beak.
AphidBroader topic: Aphids use paired stylets to pass between plant cells and reach phloem.
Scale insectRelated: Scale insects use stylets to reach plant sap.
NemerteaBroader topic: Many nemerteans have a proboscis armed with one or more stylets.
ArgulidaeRelated: Argulids use a piercing mouthpart to feed on host fluids and tissues.
WhiteflyRelated: Whiteflies use paired stylets to reach phloem sap within leaves.