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Echiurida - Wikipedia
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WEBspoonworm, any member of the invertebrate phylum Echiura, also known as Echiuroidea, or Echiurida. Nearly all spoonworms are exclusively marine. They are sausage-shaped organisms with a flattened extension of the …
Echiuridae - Wikipedia
Echiuroidea - Wikipedia
Echiurida - Oxford Reference