The roundworms: slender, unsegmented worms with a tough outer cuticle and a body cavity, among the most numerous animals on Earth by individual count even though relatively few species have been formally described. Nematoda includes free-living soil and marine species alongside major agricultural and medical parasites.
Facts
Disputed
Member Species/Taxa CountApproximate described-species (or, for a genus, described-taxon) count; continually revised as species are newly described, reclassified or synonymized. Taxonomic Rank Scientific Name Connections
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