Overview

Distribution

Deep-sea acorn worms have been found in the Pacific and Atlantic (Holland et al. 2005). Observations and collections from remotely operated vehicles operating on the Mid-Atlantic Ridge in the North Atlantic in 2010 suggests that there are several yet to be named species. One of the species typically leaves circular trails of mud. ROV observations have also shown that the worms can swim off the seabed to move around.

  • Holland ND, Clague DA, Gordon DP, Gebruk A, Pawson DL, Vecchione M. 2005. 'Lophenteropneust' hypothesis refuted by collection and photos of new deep-sea hemichordates. Nature, 434 (7031): 374-376.
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Physical Description

Morphology

Sexual Dimorphism

Generally no Sexual Dimorphism; a few species have Sexual Dimorphism in color of genital region and gonads may be visible through the body wall.
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Source: Fairbairn, 2013

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Ecology

Habitat

Enteropneusts have been found living in a wide variety of depths and habitats. The majority of species have been discovered in intertidal regions and coastal areas accessible to humans.
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© WoRMS for SMEBD

Source: World Register of Marine Species

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Evolution and Systematics

Evolution

Classification

Class Enteropneusta is not monophyletic, but the families within it are.
  • Cannon JT, Rychel AL, Eccleston H, Halanych KM, Swalla BJ (2009) Molecular phylogeny of hemichordata, with updated status of deep-sea enteropneusts. Mol Phylogenet Evol 52(1): 17-24.
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© WoRMS for SMEBD

Source: World Register of Marine Species

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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage

Barcode of Life Data Systems (BOLD) Stats
Specimen Records:30
Specimens with Sequences:8
Specimens with Barcodes:6
Species:5
Species With Barcodes:3
Public Records:6
Public Species:3
Public BINs:3
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© Barcode of Life Data Systems

Source: Barcode of Life Data Systems (BOLD)

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Barcode data

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© Barcode of Life Data Systems

Source: Barcode of Life Data Systems (BOLD)

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Genomic DNA is available from 2 specimens with morphological vouchers housed at National Institute of Water and Atmospheric Research, Auckland
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© Ocean Genome Legacy

Source: Ocean Genome Resource

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