Chelicerae
（重定向自Falcer）
![The jumping spider Phidippus audax. The basal parts of the chelicerae are the two iridescent green mouthparts.](/Images/godic/202501/12/Kaldari_Phidippus_audax_013825.jpg")
![Types of chelicerae: (A) jackknife, (B) scissor, and (C) 3-segmented chelate](/Images/godic/202501/12/Chelicerae.svg3825.png")
![3D view of the chelicerae of a jumping spider. The pedipalps were removed to see the chelicerae.](/Images/godic/202501/12/Jumping_spider_fang_3D3825.jpg")
![Spider chelicerae. The chelicerae are shown in black, the surface of the cephalothorax in brown, the legs in reddish brown, and the venom glands and surrounding muscle tissue in green. The fang portion of the right chelicera can be seen projecting into the space between the two chelicerae.](/Images/godic/202501/12/Spider_chelicerae3825.png")
The chelicerae /kəˈlɪsəriː/, are the mouthparts of the Chelicerata, an arthropod group that includes arachnids, horseshoe crabs, and sea spiders. Commonly referred to as "jaws", some chelicerae, such as those found in spiders, are hollow and contain (or are connected to) venom glands, and are used to inject venom into prey or a (perceived) threat.