Pedipalps What Are Used For

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Pedipalps What Are Used For

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A whip spider, also called a tailless whip scorpion, with its spined pedipalps. These pedipalps are very flexible and are used to grab prey. Name Giant whip scorpion [Mastigoproctus giganteus) Distinctive features Brown and gray with large pincers and whiplike telson (tail) pedipalps long foreleg used as feeler Arachnology False scorpion Harvestman. OTHER ARTHROPODS cracks, and other tight places. They are generally nocturnal (nightactive) creatures and most live in moist and Pedipalps are often equipped with numerous sensory receptors (both tactile receptors and chemoreceptors) and serve as the primary sensory structures for many mites, much like antennae do in insects. The pedipalps, however, have been modified in many groups to

serve.numerous other functions. Some predatory mites have spined or raptorial (grasping) pedipalps used for capturing prey (e.g. Cunaxidae, water mites) or pedipalps modified to help manipulate prey during feeding For example, F.T. Abushama [4] observed that the scorpion Leiurus quinquestriatus uses the hairs on the distaltarsal segments of the legs for humidity sensing while the pedipalps (the pincers), the pectines and the poison bulb appear to carry the hairs responsive to touch, odor and temperature, respectively (Fig. 2.1). On the other hand, A. Twickel [202] observed the scorpion Pandinus cavimanus (Fig. 2.1) in the situation where the hairs on the pedipalps were used for collision They stab prey, pedipalps _ including

insects,.lizards, and birds, with Effieribslicfrgzens IZZOQIOOr spide' their fangs, pour digestivejuices into the wound, and feed on the liquefied remains. Sting at the tip ofthe tail used for defense and to immobilize struggling prey a Tail isjointed so that it can bend forward Large chelicerae '6' used to kill prey, since Sun spiders lack venom Gold scorpion a Young scorpions ride on their mother's back Clawlike pedipalps grab and hold prey Legllke They can, however, pinch with their pedipalps when picked up! Whip spiders have very flattened bodies with long raptorial pedipalps used for grasping prey, fighting, and in courtship and mating. These arthropods have eight eyes, but relatively poor vision. They rely on

their.first pair of thin antenniform legs to detect stimuli such as odors and vibrations from the surrounding environment. Whip spiders are ambush hunters that use their large pedipalps to quickly grasp unsuspecting Spiders have four pairs of walking legs and a fifth pair of appendages, located just behind their mouthparts, known as pedipalps. Pedipalps are not used for locomotion but often assist in touching and maneuvering prey. Each male pedipalp is equipped with a special structure that is used to transfer sperm to the female. This apparatus makes the male palp enlarged; it is often described as resembling a boxing glove. The mouthparts, called chelicerae, each end with a fang. The fang is The pedipalps Generally the

pedipalps.consist of 6 segments. In arachnid ancestors they seem to have been pediform and raptorial as in Xiphosura. In the course of evolution, however, they have been modified in many ways. According to the modifications of structure, the function of the pedipalps varies considerably from order to order. In scorpions, pseudoscorpions and whipscorpions the pedipalps are extremely large, chelate and used as a raptorial organ. In schizomids they are 26b), but in the mites and the ticks the forebody and hindbody are indistinctly separated. The forebody has six pairs of jointed appendages, including four pairs of walking legs and chelicerae and pedipalps (fig. 26c) that are mainly used to capture prey and handle particles of food. The

male.scorpions have pincerlike pedipalps used to grab females for the mating process. When appendages occur on the hindbody, they are highly modified for specialized tasks, such as web spinning by The most prominent structures are the greatly enlarged, powerful pair of chelicerae that are used to seize, crush, and tear apart food. With the exception ofRhagodes nigrocinctus in India, solpugids generally are believed to lack distinct venom glands, and to rely primarily on their size and strength to overpower prey. The pedipalps are long and leglike, each ending in an eversible adhesive organ, rather than claws. The first pair of legs is modified as slender tactile organs that are held  masticators and swallowers (Figure 2.2E) are

more.restricted in their taxonomic distribution. Cephalopods use a beak and a modified radula for shredding prey. Pincerlike chelae are found in some crustaceans (e.g. crabs) for seizing and shattering shellfish. Mandibles are used for the mastication of both animal and vegetable material by insects, and modified parts of chelicerae and pedipalps are used for this purpose by those arachnids which masticate food. (3) Fluid Feeders.

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