palpal

/ˈpælpəl/
adjective
  1. Relating to or involving a palp (the sensory or feeding appendage of an arthropod).
    • Male spiders have specialized palpal organs used to transfer sperm.
    • The scientist studied the palpal structure of the spider to understand its mating behavior.
    • The palpal segments of the scorpion are covered in tiny sensory hairs.