( Arachnids ( ( ( ( have ( ( ( eight pairs ) ( of ( ( appendages ( rather than ) ) six ) ) ) ( -LRB- ( ( ( chelicerae ( , ( pedipalps ( , ( four pairs ) ) ) ) ) ( of ( walking legs ) ) ) -RRB- ) ) ) ) and ) ( ( are primarily ) terrestrial ) ) . ) )
(ROOT (S (NP (NNS Arachnids)) (VP (VP (VBP have) (NP (NP (CD eight) (NNS pairs)) (PP (IN of) (NP (NP (NNS appendages)) (CONJP (RB rather) (IN than)) (NP (CD six)))) (PRN (-LRB- -LRB-) (NP (NP (JJ chelicerae) (, ,) (NNS pedipalps) (, ,) (CD four) (NNS pairs)) (PP (IN of) (NP (VBG walking) (NNS legs)))) (-RRB- -RRB-)))) (CC and) (VP (VBP are) (ADVP (RB primarily)) (ADJP (JJ terrestrial)))) (. .)))
Arachnids have eight pairs of appendages rather than six (chelicerae, pedipalps, four pairs of walking legs) and are primarily terrestrial.
(ROOT (S (NP (DT A) (PRN (-LRB- -LRB-) (NP (NN n)) (-RRB- -RRB-)) (NN arachnid)) (VP (VBZ has) (NP (NP (JJ additional) (NNS appendages)) (VP (VBN called) (NP (NP (DT the) (NN chelicerae)) (CC and) (NP (DT the) (NNS pedipalps)))))) (. .)))