Dictionary > Pedipalp

Pedipalp

Definition
noun, plural: pedipalps
Either of the second pair of appendages located laterally to the chelicerae and anteriorly to the first pair of walking legs of the Chelicerates (e.g. arachnids, horseshoe crabs, etc.)
Supplement
Chelicerates, such as arachnids, sea spiders, and horseshoe crabs, are known for having segmented bodies with paired jointed limbs or appendages. One of the paired appendages is a pair of pedipalps.
Chelicerates have a pair of pedipalps located on the body segment (i.e. segment three) near the mouth. Particularly, the pedipalps are found laterally to the chelicerae, in front of the first walking legs of the Chelicerates. Chelicerae are another pair of appendages of the Chelicerates that are found on segment two, ahead of the mouth. Next to the chelicerae are the pedipalps that arise from segment three, i.e. behind the mouth. A pedipalp is comprised of six segments: (1) coxa (2) trochanter, (3) femur, (4) patella, (5) tibia, and (6) tarsus. The pedipalps may be modified to perform a range of functions including food manipulation and sensing, locomotion, defense, and reproduction.
Spider pedipalps have specialized coxae called gnathobases or maxillae. These specialized structures function as mouthparts of the spiders. Apart from the specialized coxae, the spider pedipalps may be characterized by having an undivided tarsus as well as pretarsus lacking in lateral claws. Furthermore, the tarsi of the male spider pedipalps have a palpal bulb used to inseminate the seminal receptacles of female spiders during mating.
Also called:

  • palp
  • palpus

See also:

  • chelicera
  • chelicerate
  • appendage


  • You will also like...

    green plant cells
    Plant Cells vs. Animal Cells

    Plant cells have plastids essential in photosynthesis. They also have an additional layer called cell wall on their cell..

    Water Cycle
    The Water Cycle

    The water cycle (also referred to as the hydrological cycle) is a system of continuous transfer of water from the air, s..

    Sugar Homeostasis
    Sugar Homeostasis

    The blood sugar level is regulated by two hormones. The mechanism behind this type of negative feedback control is descr..

    squirrel
    Animal Water Regulation

    Animals adapt to their environment in aspects of anatomy, physiology, and behavior. This tutorial will help you understa..

    "Opabinia regalis"
    The Evolutionary Development of Multicellular Organisms

    Multicellular organisms evolved. The first ones were likely in the form of sponges. Multicellularity led to the evolutio..

    Mātauranga Māori and Science Collaboration
    Mātauranga Māori and Science

    Mātauranga Māori is the living knowledge system of the indigenous people of New Zealand, including the relationships t..

    Related Articles...

    No related articles found

    See all Related Topics