The acorn worms, or Enteropneusta, are a class of hemichordate invertebrates whose closest non-hemichordate relatives are the echinoderms. There are 111 known species, the main species used in research being Saccoglossus kowalevskii. The class's two families, Harrimaniidae and Ptychoderidae, separated at least 370 million years ago.
Facts
Classification
DietDetritivore or Scavenger 1 System (Realm) Living or Extinct Scientific Name Connections
Child Taxon Of
Source Wikidata: Enteropneusta
In Biome
In Ecosystem
Source Wikipedia: Acorn worm
Sources
1. Wikidata: Enteropneusta
- Wikidata Q589697, class allow-list match (w-wdresolver-0926)
- Wikipedia 'Acorn Worm': subsisting as deposit feeders
- Wikipedia 'Acorn Worm': or suspension feeders
- Child Taxon Of: Hemichordata, Wikidata P171 (parent taxon) claim, rank=normal, target=Q174301 (Hemichordata)
View the Source2. Wikipedia: Acorn worm
Infobox: taxon
Enteropneusta
Article text
They live in U-shaped burrows on the sea-bed, from the shoreline down to a depth of 10,000 ft. (3,050 m).
In Ecosystem: Deep Sea, Lead
However, the early 21st century has seen the description of a new family, the Torquaratoridae, evidently limited to the deep sea, in which most of the species crawl on the surface of the ocean bottom and alternatively rise into the water column, evidently to drift to new foraging sites.
In Group: Hemichordates (Acorn Worms and Relatives), Lead
The acorn worms or Enteropneusta are a hemichordate class of invertebrates.
In Biome: Marine, Article text: "They live in U-shaped burrows on the sea-bed, fr"
They live in U-shaped burrows on the sea-bed, from the shoreline down to a depth of 10,000 ft.
View the Source3. Acorn Worm (Wikipedia)
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