any of several polychaete worms of the genus Chaetopterus that secrete and live in a U-shaped, parchmentlike tube.
* * *▪ polychaete genus(genus Chaetopterus), any of several species of segmented worms of the class Polychaeta (phylum Annelida), especially C. variopedatus of the Atlantic and Pacific oceans. They live on the sea bottom in U-shaped tubes that are lined with parchmentlike material. Parchment worms grow to a length of about 25 cm (10 inches).
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