Pedipalps, are the second pair of appendages of the prosoma in the subphylum Chelicerata. They're traditionally thought to be homologous with mandibles in Crustacea and insects, although more recent studies (for example using Hox genes) suggest they're probably homologous with the crustacean second antennae. Chelicerate pedipalps are appendages of six articles: the coxae, a single trochanter, the femur, a short patella, the tibia, and the tarsus. In spiders the coxae frequently have extensions… (More on Pedipalp)