▁and ▁ch el ate ▁and ▁are ▁position ed ▁on ▁either ▁side ▁of ▁the ▁base ▁of ▁the ▁prob os cis ▁or ▁sometimes ▁v estig ial ▁or ▁absent . ▁ ▁Pro bos cis ▁Sea ▁sp iders ▁possess ▁a ▁tub ular ▁prob os cis ▁forward ▁from ▁the ▁body ▁tr unk , ▁at ▁the ▁end ▁of ▁which ▁is ▁the ▁opening ▁to ▁the ▁mouth . ▁ ▁In ▁those ▁species ▁that ▁lack ▁ch elif ores ▁and ▁pal ps , ▁the ▁prob os cis ▁is ▁well ▁developed ▁and ▁more ▁mobile ▁and ▁flexible . ▁ ▁In ▁such ▁cases , ▁it ▁can ▁be ▁equ ipped ▁with ▁sens ory ▁br ist les ▁and ▁strong ▁r asp ing ▁rid ges ▁around ▁the ▁mouth . ▁ ▁See ▁also ▁ ▁Mand ible ▁( arth rop od ▁mouth part ) ▁ ▁References ▁ ▁Category : Ar th rop od ▁an atom y ▁Category : Ar th rop od ▁morph ology <0x0A> </s> ▁K ' uch u ▁H anka ▁( Que ch ua ▁k ' uch u ▁corner , ▁local ▁Que ch ua ▁h anka ▁snow c apped ▁r idge ▁or ▁peak ; ▁ice , ▁" cor ner ▁pe aks ", ▁His pan ic ized ▁sp elling ▁Jo cho jan ca ) ▁is ▁a ▁ ▁mountain ▁in ▁the ▁And es ▁of ▁Peru . ▁It ▁is ▁located ▁in ▁the ▁Hu án u co ▁Region , ▁Am bo ▁Province , ▁San ▁Rafael ▁District , ▁and ▁in ▁the ▁P ach ite a ▁Province , ▁P ana o ▁District . ▁K ' uch u ▁H anka ▁lies ▁north ▁of ▁W aman rip