( Argopecten ( ( is ( ( ( ( ( a genus ) ( of ( saltwater clams ) ) ) , ) or ) ( ( scallops , ) ( ( marine ( bivalve mollusks ) ) ( in ( the ( family Pectinidae ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Argopecten)) (VP (VBZ is) (NP (NP (NP (DT a) (NNS genus)) (PP (IN of) (NP (NN saltwater) (NNS clams)))) (, ,) (CC or) (NP (NP (NNS scallops)) (, ,) (NP (NP (JJ marine) (NN bivalve) (NNS mollusks)) (PP (IN in) (NP (DT the) (NN family) (NN Pectinidae))))))) (. .)))
Argopecten is a genus of saltwater clams, or scallops, marine bivalve mollusks in the family Pectinidae.
(ROOT (S (NP (DT A) (NN scallop)) (VP (VBZ is) (NP (DT a) (PRN (-LRB- -LRB-) (NP (NN n)) (-RRB- -RRB-)) (NN mollusk))) (. .)))