Nematoda is one of the most diverse phylum of animals with more than 25,000 described species. Nematodes, commonly known as roundworms, are important soil organisms, as different species of nematodes feed on bacteria, fungi, plants, and other nematodes. The key groups of soil nematodes include Panagrolaimida, Rhabditida, Mononchida, and Dorylaimida.

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