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The Phylum Nematoda consists of the species commonly known as roundworms.
Roundworms are in the phylum Nematoda. They are the most common worms in the sea.
Phylum Nematoda contains Between 10,000 and 25000 species known to man.
Over 20,000 different species have been classified.
The nematodes or roundworms constitute the phylum Nematoda. They are a diverse animal phylum inhabiting a very broad range of environments