Editing Chelicerae (section)

{{Short description|Mouthparts of spiders and horseshoe crabs}}
[[File:Kaldari Phidippus audax 01.jpg|thumb|upright=1.2|The [[jumping spider]] ''[[Phidippus audax]]''. The basal parts of the chelicerae are the two iridescent green mouthparts.]]
The '''chelicerae''' ({{IPAc-en|k|ə|ˈ|l|ɪ|s|ər|iː}}) are the [[arthropod mouthparts|mouthparts]] of the subphylum [[Chelicerata]], an [[arthropod]] group that includes [[arachnid]]s, [[horseshoe crab]]s, and  [[sea spider]]s.  Commonly referred to as "[[jaw]]s", chelicerae may be shaped as either articulated [[fangs]], or as a type of [[pincer_(biology)|pincers]]. Some chelicerae, such as those found on nearly all [[spider]]s, are hollow and contain (or are connected to) venom glands, used to inject [[venom]] into prey or a perceived threat. Both [[pseudoscorpions]] and [[Opiliones | harvestmen]] have additional structures on their chelicerae that are used for grooming (papillae in pseudoscorpions, '''cheliceral teeth''' in Opiliones).<ref>{{cite journal |last1=Engel |first1=Roberta |title=Novel discovery of lamellar papillae on the grooming organ in Synsphyronus (Garypidae: Pseudoscorpiones) |journal=Arthropod Structure & Development |date=May 2012 |volume=41 |issue=3 |pages=265–269 |doi=10.1016/j.asd.2012.02.004 |pmid=22410577 |url=https://doi.org/10.1016/j.asd.2012.02.004 |access-date=5 September 2020|url-access=subscription }}</ref> In ''[[Paratrechalea]]'', males and females have shown to have a chelicerae dimorphism, because the chelicerae is used as a mating signal for females.