The segmented worms: invertebrates whose bodies are divided into a linear series of repeating ring-like segments, each typically carrying its own set of internal organs. Annelida includes earthworms, the marine bristle worms (polychaetes), and leeches, and its earthworm members are foundational soil engineers in terrestrial ecosystems worldwide.
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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