What is the purpose of a spiders chelicerae and pedipalps?
In many forms they are chelate, or pincerlike, and are used to hold and crush prey. Among spiders the basal segment of the chelicerae contains venom sacs, and the second segment, the fang, injects venom. The pedipalps, or palps, which in arachnids function as an organ of touch, constitute the second pair of appendages.
What do tarantulas use their pedipalps for?
They are not used like legs, though. Instead, they are more like antennae: pedipalps help the spider sense objects that it encounters. Some spiders also use their pedipalps to shape their webs and to aid in prey capture and feeding. Pedipalps are used by male spiders to transfer sperm to female spiders.
What is the function of chelicerae in scorpions?
Despite this, one key characteristic is shared by all arachnids: two chelicerae, used for piercing, grasping, or chewing up food. In this case, each scorpion chelicera has a fixed and movable finger, giving this scorpion a somewhat toothy “smile.”
What arthropod has pedipalps and what are they used for?
Pedipalps are segmented appendages attached to the cephalothorax of arachnids. The structure of the pedipalps varies between organisms. In scorpions, the pedipalps end in the Chelae; the structures most people refer to as claws or pincers. They are often used for capturing or holding prey.
What do chelicerae do?
The first pair, the chelicerae, often have claws or fangs. They are used to capture prey (spiders), transport a spermatophore (sunspiders, some mites and ticks), produce sounds (sunspiders, some spiders), cut strands of silk (web-dwelling spiders), and produce silk (pseudoscorpions).
What is the meaning of a chelicerae?
chelicera. / (kɪˈlɪsərə) / noun plural -erae (-əˌriː) one of a pair of appendages on the head of spiders and other arachnids: often modified as food-catching claws.
What are chelicerae used for?
What are chelate Pedipalps?
Pseudoscorpions are small arachnids that bear a pair of chelate pedipalps, a pair of two-segmented chelicerae, four pairs of legs, and an ovate abdomen. They superficially resemble small scorpions but they lack the elongate tail (metasoma) and sting.
Which is the correct description of the anatomy and function of chelicerae and Pedipalps of the horseshoe crab?
MOUTH & LEGS Starting from the front of the crab, the first pair of appendages is called the chelicerae. These are feeding appendages used to place food into the animal’s mouth. Going down the body, the next pair of appendages is the pedipalps.
What are chelicerae and which arthropods have them?
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”, chelicerae may be shaped as either articulated fangs, or similarly to pincers.
Which is the correct description of the anatomy and function of chelicerae and pedipalps of the horseshoe crab?
What is the function of the Chelipeds?
The chelipeds are the large claws that the crayfish uses for defense and to capture prey. Each of the four remaining segments contains a pair of walking legs. In the abdomen, the first five segments each have a pair of swimmerets, which create water currents and function in reproduction.