‘Lophenteropneust’ hypothesis refuted by collection and photos of new deep-sea hemichordates

Nicholas D. Holland (), David A. Clague, Dennis P. Gordon, Andrey Gebruk, David L. Pawson and Michael Vecchione
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Nicholas D. Holland: Scripps Institution of Oceanography (UCSD)
David A. Clague: Monterey Bay Aquarium Research Institute
Dennis P. Gordon: National Institute of Water and Atmospheric Research
Andrey Gebruk: Russian Academy of Sciences
David L. Pawson: Smithsonian Institution
Michael Vecchione: National Museum of Natural History

Nature, 2005, vol. 434, issue 7031, 374-376

Abstract: Collar coded: worms that weren't Enteropneusts, or acorn worms, are creatures of the deep whose relationship with vertebrates has caused considerable interest for over a century. More recently, marine biologists were intrigued by fuzzy pictures appearing to show enteropneusts with tentacles sprouting from the collar. This would have important implications for the body plan of these so-called lophenteropneusts: were they a missing link between enteropneusts and their cousins, the colonial tentacled pterobranchs? This ‘lophenteropneust hypothesis’ is now dismissed as a case of mistaken identity. A series of remarkable deep-sea photographs and videos shows ‘broad-collared’ enteropneusts gliding along the sea bed. One specimen has been sucked up with what they call in the trade a slurp gun: this newly named specimen has the broad-collared look, but it is not caused by tentacles.

Date: 2005
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DOI: 10.1038/nature03382

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