Lamellibrachia barhami explained

Lamellibrachia barhami is a large pogonophore.^[1]

Description

Its tentacular crown is formed of several, fused, horseshoe-shaped tentacle lamellae. The second segment has two body folds, near which open the genital ducts. The trunk, which comprises 89% of its total body length, is undifferentiated. The true metasoma is without setae. The heart is a simple muscular elaboration of the anterior end of the ventral blood vessel. The brain is large, and from it arises a pair of intraepidermal nerve cords, which extend the full length of the vestimental region; thereafter, they join and form the a nerve cord of the trunk. Associated with the brain and the nerve cords are the dorsal tubes.

Further reading

• Kiel, Steffen, ed. The Vent and Seep Biota: Aspects from Microbes to Ecosystems. Vol. 33. Springer, 2010.
• MacLeod, C. J., Paul A. Tyler, and C. L. Walker, eds. "Tectonic, magmatic, hydrothermal and biological segmentation of mid-ocean ridges." Geological Society of London, 1996.
• Beesley, Pamela L., Graham JB Ross, and Christopher J. Glasby, eds.Polychaetes & allies: the southern synthesis. Vol. 4. CSIRO publishing, 2000.
• Van Dover, Cindy. The ecology of deep-sea hydrothermal vents. Princeton University Press, 2000.
• Sigvaldadóttir, Elín, Andrew SY Mackie, and Gudmundur V. Helgason, eds.Advances in Polychaete Research. Vol. 170. Springer, 2003.

Notes and References

1. Webb . Michael . 1969 . Lamellibrachia barhami, gen. nov., sp. nov., (Pogonophora), from the Northeast Pacific . Bulletin of Marine Science . 19 . 1. 18–47 .