For grasping, feeding and piercing it's prey
Arachnids such as spiders and scorpions have chelicerae.
The prey is captured by the pedipalps and the sting is inserted in it, the paralyzed or killed prey is sucked using the chelicerae.
Chelicerae.
Chelicerae are the ends of celery that you don't eat. Pedipalps are pedicures that involve a pulp foot massage.
Chelicerae and mandibles are both types of mouthparts found in different groups of arthropods. Chelicerae are characteristic of arachnids (like spiders and scorpions) and typically consist of two segments, often functioning as pincers or fangs. In contrast, mandibles are found in crustaceans and insects, featuring a pair of jaw-like structures used for biting, chewing, or gripping food. The key difference lies in their structure, function, and the groups of animals that possess them.
A spider uses its chelicerae to catch its prey by stabbing it and injecting venom into it.
one is a chelicerae and the other is a menimable
pedipalps
chelicerae hexapods diplopods chilopods crustaceans
Spiders. horseshoe crabs, sea spiders, mites, ticks...and other arachnids.
A chelicerate does not have antennae because it is missing the nerve bundle that would control that structure. Instead, chelicerates use setae to detect changes in air currents and provide equivalents to smell and taste.
The scientific name for an arachnid's mandibles is 'chelicerae'. Literally, the word means 'claw horns'.