The `` roundworms '' or `` nematodes '' -LRB- phylum Nematoda -RRB- are the most diverse phylum of pseudocoelomates , and one of the most diverse of all animals .

The roundworms or nematodes -LRB- phylum LOCATION@1 -RRB- are the most diverse phylum of pseudocoelomates , and one of the most diverse of all animals .
