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The acorn worms or Enteropneusta are a hemichordate class of invertebrates. The closest non-hemichordate relatives of the Enteropneusta are the echinoderms. There are 111 known species of acorn worm in the world, the main species for research being Saccoglossus kowalevskii. Two families—Harrimaniidae and Ptychoderidae—separated at least 370 million years…
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acorn worms species proboscis mouth cilia water blood food system body sinuses vertebrates collar dorsal harrimaniidae ptychoderidae gill slits enteropneusta
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Acorn worm | related to Anatomy | Most | 0.60 | section |
| Acorn worm | related to Anatomy | Balanoglossus | 0.60 | section |
| Acorn worm | related to Anatomy | The | 0.60 | section |
| Acorn worm | related to Anatomy | Some | 0.60 | section |
| Acorn worm | related to Anatomy | Acorn | 0.60 | section |
| Acorn worm | related to Circulatory system | Acorn | 0.60 | section |
| Acorn worm | related to Circulatory system | Unlike | 0.60 | section |
| Acorn worm | related to Circulatory system | Nonetheless | 0.60 | section |
| Acorn worm | related to Circulatory system | From | 0.60 | section |
| Acorn worm | related to Circulatory system | This | 0.60 | section |
| Acorn worm | related to Digestive system | Many | 0.60 | section |
| Acorn worm | related to Digestive system | Others | 0.60 | section |
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